It's all about fit, which is something fans and NFL front offices will learn all over again in hindsight a few years removed from Thursday's first round of the 2018 NFL draft. 

To use recent examples, Leonard Fournette with the Jacksonville Jaguars was a superb fit and has worked out wonderfully. However, John Ross and the Cincinnati Bengals, not so much. The results aren't always instantaneous, either—think Johnny Manziel and the Cleveland Browns. 

As always, the best fits marry a number of different factors. Schematics, coaching, the depth chart, finances and more weigh into the projection of instant fit analysis, and these can change as the new pairings make their journey together. 

Below, let's highlight the best fits from the first round, sticking to the draft order and analyzing some of the biggest talking points surrounding pairings sure to have a positive impact on all involved for years to come, and possibly right away. 

5. Denver Broncos: Bradley Chubb, Edge, NC State

It doesn't get much better than this. 

With the Cleveland Browns stunning the world by drafting Ohio State cornerback Denzel Ward at No. 4, the Denver Broncos watched NC State edge presence Bradley Chubb fall to No. 5—a shocking event, considering the Broncos had been considering trades, according to ESPN's Adam Schefter. 

But Chubb fell, and now the AFC has a problem on its hands. He fits perfectly in Denver and forms a triple-headed monster with Von Miller and Shane Ray—the No. 23 pick in 2015 with 13 sacks to his name, including an eight-sack season. 

Miller himself had high praise for his new teammate, according to NFL Network's James Palmer: "Von Miller called Bradley Chubb a combination of himself and Khalil Mack. That's pretty high praise for his now teammate."

Chubb, 6'4" and 269 pounds, was by far the best edge presence in the draft with superb physical attributes and plenty of collegiate production to match. Those attributes and his versatility mean he can play on any defensive front, something defensive coordinator Joe Woods will use to his advantage right away. 

6. Indianapolis Colts (from NYJ): Quenton Nelson, G, Notre Dame

The definition of "fit" can vary in meaning on a team-to-team basis. 

For the Indianapolis Colts, the fit primarily revolves around whether the prospect can help quarterbck Andrew Luck stay upright, healthy and productive. 

Quenton Nelson does all of the above in a massive way. 

Nelson is the rare generational prospect who can change the complexion of an entire unit. He's athletic enough to probably play anywhere on the line, though the 6'5", 325-pound blocker with a mean streak will suit up at guard for the Colts. 

Pro Football Focus' Pat Thorman explained why the Colts didn't blink when walking to the podium for this one: 

"QB hits allowed by the #Colts offensive line since Andrew Luck was drafted:

44 (t-2nd most)
46 (3rd)
61 (1st)
62 (1st)
56 (1st)"

At a time when guard play is more important than ever because of rushers who can bring pressure up the middle, Nelson can lock down one side of the line in front of Luck.

He's often on film taking out one defender and intelligently heading for the next one, something he shouldn't have a problem doing at the next level, either.  

8. Chicago Bears, Roquan Smith, LB, Georgia

The Chicago Bears have had problems filling out the linebacker spot since the Brian Urlacher days. 

That likely ended Thursday with the team selecting Roquan Smith. 

The Georgia product has attributes teams seek most in a linebacker, as he's rangy, able to diagnose plays quickly and can hold up in coverage well. 

Mike Clay of ESPN hit the nail on the head when thinking about the fit: "Roquan Smith next to Danny Trevathan in the Bears' 3-4 is nasty. Can't wait to see Vic Fangio at work with that duo." 

Smith, 6'1" and 236 pounds, is a higher-ceiling version of Lance Briggs in some respects, which is exactly what Bears fans should want to hear coming out of a top-10 selection. 

While the Bears have Akiem Hicks up front and Leonard Floyd rushing off the edge, Smith likely doubles as the new face of the defense. He'll be its most productive member right out of the gates and serve as a versatile weapon for coordinator Vic Fangio, one of the best minds in the game right now. 

10. Arizona Cardinals (from OAK): Josh Rosen, QB, UCLA

The Arizona Cardinals hit the jackpot at No. 10, plucking UCLA quarterback Josh Rosen out of a brief fall. 

Rosen is one of the more polarizing prospects in this year's class for various reasons, yet he's a big get for a Cardinals team that wanted Patrick Mahomes last year, as well as Kirk Cousins in free agency this offseason, per ESPN's Adam Schefter. 

One of the better parts of the fit here is the fact Rosen might not have to start right away, provided Sam Bradford can stay healthy. Which doesn't mean he isn't capable—Rosen checks in at 6'4" and 226 pounds with arguably the best mechanics of any quarterback in the class. 

Those mechanics led to plenty of production, including 3,756 yards and 26 touchdowns against 10 interceptions last season on a 62.6 completion percentage.

He's now entering a depth chart where his game translates well, especially with his being able to hit reliable targets like Larry Fitzgerald and former MVP-contending running back David Johnson. 

Call it a marriage both parties maybe didn't think was possible given the pre-draft hype, yet one of the better shakeouts to occur of the process. 

13. Washington Redskins: Da’Ron Payne, DL, Alabama

Kudos goes to the Washington Redskins for nailing down a strong, if not conservative (compared to how aggressive they used to be) offseason to date. 

The Redskins went out and took care of the quarterback spot early with Alex Smith, making the position a non-factor and sitting tight at No. 13 on Thursday night, prompting them to take the best player available. 

Said best player available just so happened to fill one of the roster's biggest needs. 

Da'Ron Payne plugs a huge hole for the Redskins right in the heart of the defense, meaning the unit gets a 6'3", 311-pound run-stuffing extraordinaire with an elite athletic profile hinting at plenty of upside when it comes to rushing the passer. 

The Redskins clearly view Payne as a three-down player who can grow into a disruptive force on passing downs, which is nothing but good news for him in the fit department—he'll be rushing alongside effective fellow former Alabama stars like Jonathan Allen and Ryan Anderson. 

A chance to be a standout rookie and a chance for both parties to find long-term success starting right away makes this one of the best fits of the first round. 

21. Cincinnati Bengals (from BUF): Billy Price, OL, Ohio State

Ohio State center Billy Price was one of the bigger unknowns heading into Thursday night due to an incomplete tear of his pectoral at the scouting combine. 

Funnily enough, the Cincinnati Bengals were one of the bigger unknowns as well after already shoring up the biggest need of all with the Cordy Glenn trade, meaning they could have gone any number of ways at No. 21. 

Fittingly, the two came together. 

Price, 6'4" and 305 pounds, is clearly happy with the fit, according to Paul Dehner Jr. of the Cincinnati Enquirer: "This is exactly what I wanted in this draft. It's unreal right now."

This is different from the usual post-selection talk from a prospect, too. In Cincinnati, Price gets to stay somewhat local while starting right away as the anchor of the offensive line.

Those Bengals are hoping to revert to more of a run-first approach led by new offensive line coach Frank Pollack, so few rookies will have the chance Price does to help completely remake an entire unit. 

A fit of need and convenience, Price to the Bengals was predictable—which isn't always a bad thing. 

26. Atlanta Falcons: Calvin Ridley, WR, Alabama

The first round's most extreme case of the rich-get-richer happened at No. 26, when the Atlanta Falcons grabbed Alabama wideout Calvin Ridley out of a fall. 

Ridley's fall wasn't totally unexpected—but not because of him. It's a weak overall class at wide receiver and depth elsewhere pushed his entire position down the board. 

And it couldn't have worked out better. 

Ridley, who managed to stand out in Alabama's run-first attack last year with 63 catches for 967 yards and five touchdowns, was far and away the best route runner in the class and boasted some of the surest hands.

At 6'1" and 189 pounds, he'll get to comfortably work on routes and situations perfect for his skill set while Julio Jones does the heavy lifting. 

NFL Network's Bucky Brooks was one of many to praise the fit: "Calvin Ridley to the Atlanta Falcons could be scary. [Head coach Dan Quinn] and [Falcons general manager Thomas Dimitroff] always talk about acquiring 'urgent athletes' to upgrade the explosiveness on their roster. Ridley is a dynamic route runner with speed, wiggle and hands. Nice WR3 to work into the offense."

It should go without saying, but quaretback Matt Ryan's offense just got quite a bit better right away and Ridley, should he have a smooth transition to the pros, should compete for some individual hardware on top of everything else. 

32. Baltimore Ravens (from PHI): Lamar Jackson, QB, Louisville

Everybody knew this was going to happen—they just didn't know which team would make the move at the end of the first round. 

As it turns out, one of the best possible fits made the move. 

The NFL wasn't going to let Lamar Jackson fall to the second round. That fifth-year option is too valuable on the expensive quarterback market, and we are still talking about a guy who drummed up 3,660 passing yards and 27 touchdowns through the air last year, with another 1,601 yards and 18 touchdowns as a rusher. 

Perhaps the biggest knock on Jackson is his frame (6'2", 216 pounds), though he's smart about taking hits. While he shows flashes of Michael Vick in the open field, he's not a pull-it-down-and-go sort of quarterback thanks to his ability as a passer. 

The Ravens won't be impatient with Jackson's development, and they'll likely install plenty of RPO and play-action looks to make the most of his skill set. In the interim, Joe Flacco's got one more year of guaranteed money on his contract before a potential out after 2019. 

And now for the kicker, which NFL Network's Ian Rapoport was all over: "Hard to imagine a better offensive coordinator for Lamar Jackson than Marty Mornhinweg, who had Michael Vick. The Ravens likely have him sit a year, learn, then fully commit to a new offense for 2019."

Fit, finances, the depth chart, everything—the first round saved the best fit for last.