My list would go as follows, I'm pretty sure I'll think of more anytime soon:
Darth Vader
The Witch king
Sauron before he got his fingers cut.
Darth Vader
The Witch king
Sauron before he got his fingers cut.
he strangles you with the force, come on people this is not a tough call
I had that one btw. I had almost all of them actually. Gave them all away.