Exar Kun's Power
In the interest of fairness, here is the beginning paragraph of Exar Kun's entry in the Complete Star Wars Encyclopedia:
"Exar Kun Once the most powerful and dangerous of the Dark Lords of the Sith, he was responsible for the deaths of millions four millennia before the Rise of the Empire. Killed by an overwhelming force of Jedi, the dark spirit of Exar Kun survived across the vastness of time to challenge Luke Skywalker and a new group of Jedi trainees."
With one of the new LotF books (Faunus pointed it out) mentioning that Caedus is "the most powerful of the Sith Lords" and now this, Palpatine seems to be having some stiff competition.
Discuss.