I think outside of Captain America most of the other characters don't mirror their comic characters all that well. This is not saying that they were bad portrayals though. The movie portrayals were inline with the MCU brand and overall storyline and in many ways made the characters more appealing to a broader audience. The characters did allow for a newer generation to get into comics, which is a good thing. While I think Marvel comics are crap right now as a whole because they are allowing the film portrayals to be the source of the comic portrayal and that has made for some less than desirable stories, the newer generation likes it.
I think Cap (616) and Nick Fury (Ultimate) might be the truest to their source material counterparts.
TRUTH, JUSTICE, HOPE
That is, the heritage of the Kryptonian Warrior: Kal-El, son of Jor-El
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I don't think Nick Fury is like his Ultimate counterpart, except for looking like Samuel L. Jackson. In the comics he was far more extreme, like he baited Red Skull out of hiding to get the Ultimates to get back together just so he could get his job back, he used Gregory Stark to overthrow governments, and exploited Spider-man death to guilt trip Carol danvers into resigning so he could be director again. IIRC he was a serial cheater/womaniser, to a stupid degree. As in he slept with his ex-wife's mother and sister. Something ridiculous like that. The rest is just plain old 616 Nick Fury.
0_o
He didn't show any signs of that in Ultimate Spider-Man, which is what I had in mind. I steered clear from the rest of that line of comics especially the Ultimates because characters annoyed me there, especially Bruce Banner (upset that the team were discussing which actor portrays who and injects himself with the Hulk serum and goes on a city destroying rampage) and Steve (rude to everyone) Rogers.
TRUTH, JUSTICE, HOPE
That is, the heritage of the Kryptonian Warrior: Kal-El, son of Jor-El
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As an aside, the greatest strength of the MCU has always been cherry picking the best parts from their sources (Ultimate, 616, cartoons, etc.) to make the best versions of their characters.
"Always listen to the crazy scientist with a weird van or armful of blueprints and diagrams." -- Vibranium
Iron Man has always struck me as the closest. But the MCU is based on the Ultimate verse, so none of them are going to be all that close to anything in the 616.
Every day is a gift, not a given right.
This myth really needs to stop. MCU is not based on Ultimate universe. It takes a few things from it, sure. But overall, I would still say it's closer to 616 than Ultimate, especially when it comes to characters' personalities and general tone.
This guy gets it.
Because Nick Fury from Ultimate was already based on Sam Jackson.
Was not speaking for others but was pointing to a fundamental flaw with Spiderman. Didn't Ben make a small cameo in Spiderverse and Spiderman Game 2018?
That's true when it comes to broadstrokes, but there's still a lot about a characters' history a reboot should make clear. DC characters have it worse than Marvel characters. What was Krypton like? Was Superman ever Superboy? Did he have a Kryptonian dog? Are the Kents still alive? Most interpretations will be based on something in the comic books, even the ones that contradict another show or movie.
Spider-Man is getting to that point as well because of all the cartoons in addition to the movies that differ from each other. Was Mary Jane his neighbor growing up or did he meet her later in life? Was the spider that bit him radioactive or genetically altered? When did he meet Harry? Was Gwen his girlfriend who was killed or is she an active superhero named Ghost-Spider?
At no point in any of the marvel movies did I ever feel like I was watching an Ultimates movie. Ultimates tended to vary on edgy with everybody acting like jerks. MCU was far more light hearted and fun.