Piper, but you know he is one of the ones who proved that in many ways a belt is just a tool to get a guy over, and that if you have enough talent you really don't a title. Proof was with his IC Title reign, Piper was no more over as a result of it. Hot Rod is one of the all time greats, World Title or not.
Completely agree with this, but still would have done well with the belt and helped the guy he dropped it to, which he did with the IC belt.