Originally Posted by Lester Burnham

To have a meaningful list you really gotta take out gods, ethereal beings, demons, etc., otherwise, the list gets kind of stupid. Therefore throw out Galactus, The Beyonder (who was basically a God), Phoenix, and other folks like that. Hell, I'm surprised people didn't bring up Thor. Odin (his dad) would whup on any mortal.

As for mutants-superheroes that were born human, I'd go with:

Hulk

Molecule Man

Wolverine (he is basically industructable with rapid regen and adamantium skelly)

Prefoessor X

Dr. Strange