Purely on hype? I might still bet on Dooku, tbh. He was the greatest Jedi the Jedi Order had produced in centuries, and he was an even greater Lord of the Sith. He learned under the two most powerful avatars of the light and dark sides in history, and it took the chosen one to put him down.
It really doesn't hurt to be active during Star Wars' most climactic era, does it?
Well, logistically, Dooku came(he he) a thousand years after Bane, so he has much, MUCH better resources to study from and Sidious gave him like three holoprojectors and taught him some basic Dark Side tricks(just like he did Vader and Maul) so that >>> Bane's librabries containing Sith text which he found basic that Sidious' apprentices found awe inspiring.