Cap may be a goody two-shoes, but he is bad ass all around taking his physicality into account.
What would you call a man who isn't a super powered being, but is very willing to go toe-to-toe with super powered beings (I mean those that can fly, control minds, crush cars in their hands, shoot laser beams, etc etc etc). Cap is certainly more than just a man, and he may be the moral compass of the Marvel universe, but he is most certainly a bad-ass by any definition.
and every Black Character has to be a Bad-ass, otherwise what's the point?
There are only so many, so each one has to stand out.