Seriously, that should never happen.
But, as quoted in the movie The Incredibles, "when everyone's super, no one is".
We can take the general group dynamics of any team or group of heroes and villains and break them down into archetypes. City of Heroes/City of Villains has done this fairly well.
There's always some genius-level-and-beyond intellectual, someone who can take the abuse and throw it right back, and others who fit somewhere in between those two.
Spider-Man is one I like to think of that fits in between the two.
He's no Reed Richards or Lex Luthor, nor is he the Hulk, but he can usually out-think most of his oponents, and he takes as good a beating as he gives.
Batman is one that balances the two.. he's tougher than most any normal person, and smarter than even the super-powered intellects out there. But he stills gets beat down and outsmarted every now and then.
I don't know why I coloured this guy like one of the fellas from Orange Box/Team Fortress 2..it's not bang-on for the colours, but close enough he could blend into the crowd, providing no snipers are looking for him.
What's the general heavy-hitter on a team? Big. Almost hulking/oversized to a comical proportion. Most never have long flowing hair (Thor... yeah.. let's not discuss Thor right now. 'gods' don't count as heavy hitters, imo.. they count as ace-in-the-hole people) but either short hair or no hair (hulk & the thing come to mind). They also tend to have very big hearts (literal pun intended, why not).
So, here's my take on a generic heavy-hitting super hero.