Revan is the most epic thing in history (epicer than Galen Marek) what class is most like him?
Depends on whether you refer to the original or the canonical Revan. Which makes a difference in this case.
Spoiler in the "I am your father" league for Knights of the Old Republic:
However the canonical Revan... Spoiler for Imperial Side events in SW:TOR (can't be more specific, because that would already give it away):