Jeez Spidey really ran away with this poll, huh? I haven't got the slightest clue what I stated in this thread already, but I never voted so obviously I couldn't decide then. I finally decided to go with Captain America.
1- Green Goblin (Norman Osborn)
2- Magneto
3- Doctor Doom
... Dark Reign exciting anyone?
Of the choices listed as options... I have to go for Wolverine, based on his notoriously supple morality, but Cap comes as a close second as being both a badass and the model of what a hero should be; after this is Iron Man for sheer intellect, arrogance, and charisma.