My favourite Revenge moment would have to be when Vader sees Ob1 at the top of Padmé's cruiser on Mustafa. I think it's just Ob1s stance, it rules, it emanates "I'm here to kick your Sith butt!!"

Close second is when Yoda stabs the Clone Trooper in the heart.

Third is Yoda climbing Chewies arm.

Fourth would be... heck, the rest of the movie!!!