31. Thulsa Doom
Well, looks like Ankh-Morpork Guard already nominated Darth Vader, who IMO is the greatest movie villain of all time so I'm gonna have to go with another favorite of mine.
This villian, like Darth Vader, was also brought to life by the talent of James Earl Jones
Name: Thulsa Doom
Movie: Conan the Barbarian
Memorable Quotes: "Now they will know why they are afraid of the dark. Now they will learn why they fear the night."
Memorable acts of Villainy: Decapitating Conan's mom while he stood in her protective embrace, ordering one of his followers to commit suicide simply to illustrate a point.
Bio: Thulsa Doom is the dark wizard who leads the Children of Doom, a cult that worships the evil Stygian serpent god known as Set. Using honeyed words, empty promises, and his own powers of mesmirization, he lures the impressionable and unsuspecting into his service. It is said that Thulsa Doom is over a thousand years old, and has the power to summon demons. His cult practices such monstrosities as human sacrifice and cannibalism within their underground temple, and his followers' only purpose is to die in his service.
Cold and calculating, Thulsa Doom appears to given up his last shred of humanity a long time ago. He rarely shows emotion, and slaughtered an entire clan of Cimmerians just to obtain the fine steel weapons that Conan's people were skilled at making.