Best:
"Bane is the weakest of the Banite Sith" - I guess either an anti-wank of Bane or a wank of Sidious/Plagueis/etc., but it's kind of game changing.
"Sidious is the most powerful sith lord of all time" - because he actually is.
"Sidious is a universe buster" - simply because it sounds ridiculous but is actually technically canon
"Anakin is the most powerful Jedi of all time" - ditto.
My Luke wank, of course.
Worst:
SW_Legend
Ant's Revan wank
Neph and Nebaris's Bane wank
Probably missing a lot