I'd actually vote Frank Shamrock. He may not have put on his best performances by the time he was fighting in SF but if you're going to compare careers I would say Frank Shamrock. Though Dan is a close second.
Ha! These guys don't know or care about history. Obviously if you fought before God/Dana invented TUF then you were an unskilled brute fighting cans.
Don’t pick a fight with an old man. If he is too old to fight, he’ll just kill you.