I'm confused. If we're discussing the best fighters, then you have to consider the fighter as a whole, as he appears in the comic. They're not going to come to the battlefield butt-naked with their skills or powers or whatever they bring to the table as a fighter tied up and stuck in a knapsack. You are not talking about REAL combatants, but fantastical fighters with fantastical powers that make them the fighters they are. Cap will have his Serum, because it is part of him and he was not Cap until after he took the injections and the Vita-Rays and the training in all those different forms of hand-to-hand combat. The same goes for the Black Panther or Dare Devil or any of these other guys. You can't strip them down to what their characters are NOT, and then say, "Okay, NOW who's the best?" Either we're discussing the actual characters, or we're discussing a skewed version of them.