There are two characters that come to mind, but for completely different reasons. The first is because the sheer scope of time the character was played and the breadth of depravity indulged in. The second character was only played for a single chronicle, but had a more personal meaning to it.


Rahtep the Builder - Follower of Set
5th Generation game set in prehistory which my group played all the way up to Gehenna and beyond. Slavery, assassination, torture, toppling governments, starting wars, the drug trade, building cults that used human sacrifice, international banking...