By power/ invincibility....
Dr. Manhattan- can create kryptonite
Superman- who can obtain a nonexistant element? ^^^^^^
Hulk- toughness
Doomsday- toughness, hulk beat him
The thing- same, but not as badass
Wolverine- regen
Because I like them
Cyclops- Heeza firin' his lazorz
Magneto- F*ckin' magnets, how do they work?
Titanium Man- Titanium is better than Iron
The Punisher- he's more real life and believable
Daredevil- he's blind and, still, a badass.