LeEl Alpha

Though it could never truely never be known of who the greatist of jedi are, in my opinion I would say Revan, as Kreia states looking at Revan was looking into the heart of the force, hinting at seemingly limitless power, although he/she perhaps did not have the natural ability to sap the wills like Exile, he was still able to harness the ability for himself as stated by Kreia when he turned other jedi and republic soldiers to his cause when he became a sith lord. From dialogue in the KOTOR games the jedi and sith Revan's were extremely powerful, charismatic, and resourceful tactical mastermind that seemed to be several steps ahead of everybody.