Bartholomew Kuma must be pretty high up there...
He can fire bullets of air from palms of his hands at the speed of light. Imagine what he could do with a rock. Thats like DBZ level fire power there. He can also deflect/block anything with his palms, can travel at the speed of light, has a body harder/more durable than steel and can fire direct energy weapons from his mouth. IMHO there alot of characters who can’t beat him.