hmm, yeah this is a close battle. Unamped Malak still has very good accolades and has defeated Revan in combat, who at the time had beaten Darth Bandon, Calo Nord, beaten a terentattek (force resistant rancor), took out almost the entire leviathan crew, etc. He was able to overwhelm Leviathan Revan with the force (twice), and his lightsaber ability is said to be even better than his force power.