#16
Kil'jaeden and archimonde
Gul'dan is the most powerful non-Eredar warlock ever to exist, but of course the eredars mach more powerfull then him..according to www.wowwiki.com archimonde is "Arguably the single most powerful being to ever set hoof in Azeroth" (other than the titans or the old gods) so he should be the most powerfull warlcok... but Kil'jaeden is the same rank as archimonde so they should be equal in their powers but archimonde is the fighter one and Kil'jaeden assimilating every race possible into the folds of the Burning Legion.
