I'd say Revan.
Revan's killed Jedi and warriors like Darth Malak, who is one of the most skilled swordsmen of his time, Darth Nyriss, a member of the dark council for twenty years, who managed to defeat Meetra Surik and Scourge, Mandalore the ultimate, Yusanis(granted yusanis is only powerful in name) and even held his own against the sith emperor,Vitiate and withstood three-hundred years of torture and finally he fought against the most skilled strike team of their time, not to mention the countless of Sith Master/apprentices Mandolorians, droids and rancors on the various planets he visited before and after his mindwipe.
Originally posted by FreshestSlice
The randoms Revan constantly seems to go up against seem to manage, with not a single death any time.
I would expect a Strike Team to suffer casualties in a battle with Revan in a proper storytelling medium.
Moreover, a Strike Team of several powerful Force-users and/or skills opponents are likely to press a single opponent much more so then otherwise.
Originally posted by S_W_LeGenD
No, he is outgunned in this contest.
Vader has better feats unless you count game mechanics. I dunno even know why I'm going to attempt to dissuade you of all people that Revan is not on Yoda or Sidious' level. But he's not. Vader is more powerful than pretty much any Banite Sith not named Sidious or perhaps Plagueis.