Revan all the way.
Master of light side, master of the dark side, he saved the republic, he as a sith lord created the rule of two, as a jedi was 4000 years ahead saying the jedi should have a family (just like new jedi order) He only lost duels in which he was betrayed. He was able to figth Emperor after being captive for 3 years. We dont know if he really died. We know that he was the heart of the force.
Revan was defeated by the Sith Emperor in his book and by imperial players in this game, none of which are the greatest force user of all time.
Your fanboyism is showing.
G-Canon states it's Luke Skywalker.