Source: comicvine.gamespot.com

4. Silvermane

ROBOT MAFIOSO!!!!!!!!

If you want more than that from this entry, I'm sorry, but you're not getting it.

Silvermane was the don of the Maggia, the organized crime ring Marvel came up with because they were headquartered in New York and when you're headquartered in New York, you maybe don't wanna try to piss off the Mafia.

Not that the Mafia exists. Because they don't. And you didn't hear otherwise from me.

So Silvermane spent most of his life in the pursuit of eternal life. Especially because he was super old. After failing to give himself immortality via the tablet of time, he instead resorted to the idea of a robot body. But he kept his weird old man head, which seems like a bad idea. When "shoot it in the face" is most people's plan to deal with anything threatening them, you maybe don't want to design yourself so that plan works on you. Just sayin'. Also, he was temporarily defeated by a trash compactor. Poor Silvermane.