@ ric: I'm old enough to drink, just choose not to.
Oh, my children. I must now school you in comic book heirarchy. First, the Hulk? If we are talking about a simple physical brawl then the Hulk would be up there, with the Thing and the Sub-Mariner (not many people realize that he is also class 100 (meaning he can lift 100+tons)). But this is an overall best hero.
Runner up: Wolverine. He has an adamantium skeleton, claws, and lets not forget the healing factor.
Winner: Professor X. Now, I know that some people will disagree (see initial post, I have argued this for hours.) But here is the thing. Professor X has been killed before, he survived on the astral plane, inhabited the Hulk's body, and eventually got his back. Has been crippled twice and come back to walking. But these are all just side notes. The reason he is the greatest mutant hero. He can, turn off your mind. (See The Uncanny X-Men Fatal Attractions crossover Wolverine #75). He put Magneto into a vegetative state because he got pissed.
Best bad guy: Tie between Magneto and Dr. Doom.
Sorry, Venom can't beat Spiderman or Carnage. Not powerful enough to win.
Caveat: this is not coolest good guy or bad guy, just most powerful.
Sorry, my geek is showing.
And despite all of this, I found a beautiful girl to marry me.
Simpsons rule.