While this subject is certainly a matter of opinion and rife with a slew of factors, I want to simplify things and make this an imaginary straight up, one-on-one fight between the individual members of the Avengers. First, this will be only the six main characters from the films, in particular Marvel's The Avengers, and only in their strongest forms. So, Tony Stark only in his suit and no Bruce Banner. Plus, it's only their physical power I am imagining, not their overall ability to cause mayhem/destruction, so Tony Stark's intellect and money have no play here.
Chris Helmworth's Thor gave as good as he got in the film fighting Hulk toe-to-toe. However, I think there's little doubt what would happen if Hulk went full out against the God of Thunder. You could say Thor and his adopted brother Loki are about equal in strength and Hulk beat Loki like a red headed step-child. Man, that scene was hilarious! "Puny god." The first time I saw the movie in the theater I didn't even hear the line, because people were laughing so loud I didn't catch it.
That leaves Black Widow and Hawkeye, another tough one to decide. They are "just humans" but incredibly skilled ones. In the film, they show Black Widow taking out the brainwashed Hawk with her fists and feet. One could conclude she wins this battle on that evidence alone, but that is a little unfair. First, that outcome could be based more needed story point than a straight fight between them as Whedon simply needed him to come back to the team and she was the one to do it. Secondly, because Hawkeye's skills lie in long range attacks, Black Widow has an obvious advantage here. If they started out far away, he could shoot her down, right? Still, I gotta give her the nod here. Most fights wind up in close quarters for this kind of thing (comic books) and also on the ground. She's got mad skills and would take him down.
Am I wrong somewhere? Where would you place them all? Should Samuel Jackson's Nick Fury be on the list or even Agent Coulson? Sound off below.