RoT Darth Bane vs Darth Plagues
Who do you think would win?
I think this would be a fairly even match up. They're both large and dominantly strong fighters physically. With their speeds, Plagues has moved as fast as a thunderbolt while Bane has been depicted to appear to be wielding a dozen sabers at once. With TK Plagues has been able to disintegrate a group of Assassins with Force Waves--Bane has done the same against Technobeasts. Both have been regarded as absolute masters of lightsaber combat, and have shown clear superiority to even extremely skilled duelists in the mythos. Both have devastating Force Lightning as well.
Their most major differences would be Midichlorian Manipulation(Plagues) and Orbalisks(Bane), both having unique advantages. So who'd win?