7. King

King, the 7th S Class hero of the Hero Association. His power is unbeknownst to the likes of One Punch fans. Of course until season 2 when King admits that he has no powers at all and he's just in the wrong place at the wrong time.

Saitama is actually the one who killed all the monsters who got King to the position he's in now at the Association. King just likes sitting at home playing video games, and is thinking about quitting being a hero because it's too dangerous for him.