Bah, doctor Phil is an ignorant fool and a pansy, no, I will tell you who is capable evil overlords: William 'Bill' Gates and What's her name, she is going to jail for embezzlement.
I'll stick with machiavelli, and take a few pointers from Saddam.
Cults are good, as long as YOU don't drink the Kool-Aid...A real evil overlord would have several cults secretly under his control...To weed out the weak and stupid...