Most Powerful Character Count Dooku could Ragdoll?

Darth Maul and Bane

Didn't know you have such a low opinion of Dooku.

Ragdoll, as in exploit gaps and use telekinesis on the opponent? Anybody.

Ragdoll, as in, well and truly fodderize an opponent with the force, obliterating all counters with minimal effort? Hard to tell. In the PT era, any Jedi Master aside from the top 5/6, probably.