Quint

Dude, he's totally in, trust me.

Don't Believe Me?
He was in Season 2, Episode 11, it's just that his fight was never recorded. OP now refuses to use him out of shame. Poor bastard.

Feats

 * Beat HUNK, Demon King Todd, The Bogdanoffs, Mr. America, Battler, Bane, Senator Armstrong, Adachi, Jacket, Leon, Chris, and Pegasus all at once
 * Is too powerful to ever appear again
 * Made Chris and Leon wake up from their comas out of fear of his power and then beat them up so badly they went into another coma for a week
 * Is too powerful to be shown on camera

Trivia

 * Trust me bro, he's in. Totally.