Are we gonna go that way? Ok....
Capitan America in E616 is ,by definition, peak human. That's the very concept of the character: oppose the "just human" concept to the Nietzche, borrowed by the Nazis ,concept of superhuman. As fast as a human can be, as strong as a human can be... a perfect human ( and just that) with perfect genetics and perfect training.That's the essence of the character.
Mockingbird regained powers as I already stated: there's rectcons. She was an Avenger and Superhero before that.
Black Widow, Hawkeye and Punisher are not heros....we will come back at this later.
Elektra has superpowers ( low order telepathy) after being resurrected by The Hand ( again a retcon).
So...in the end what you are telling me is a personal perspective,right? I mean:
1. The definition of superheo is clear.
2. Everyone considers Black Widow or Hawkeye a superhero.
Because if that's it "I don't consider Hawkeye a superhero because he does not have powers" I'm fine with it but it's important to understand the rest of the world and the dictionary disagrees wich is not a bad thing: I consider The Scarlet Pimpernel the first superhero ever ( 1905) and there's people who agree and people who disagree.