Who are the greatest villains in TV history and why?

I know these are all from recent shows, but I would say:

  1. Ben Linus (LOST)- He was so cold and calculated. He manipulated everyone on the island, and got them to fear and respect him at the same time.
  2. Gus Fring (Breaking Bad)- Just as cold as Ben but in a more sinister way. Although Gus destroyed the cartel, he didn't care who he lost in the process and created his empire through those means.
  3. T-Bag (Prison Break)- Just a scary, scary character who feels all too real. He can charm the hell out of someone and then won't think twice before killing them in cold blood.