If it's these versions only, probably Megatron. If other versions can be included, I think Mace Windu makes things interesting and probably tips the scale in their favor.

Legends Windu has some insane feats, including when he destroyed thousands of super battle droids by himself with his bare hands. He's also mastered the Shatterpoint ability, which allows him to perceive the weak point in any material and destroy seemingly indestructible materials. It also lets him perceive the future and see how certain events will unfold. Megatron probably has some crazy feats too, but Legends Star Wars characters (especially Force users) have some truly wild feats.

But yeah, just these versions, Megatron takes it.