The most evil person in history?

Vlad the Impaler gets my vote, He would drink peoples blood, drain thier blood in to tubs and bath in it. Ride through town sticking peoples heads on pikes giving him the name "Vlad the Impaler" this guy is also known as the original Count Dracula or Drăculea meaning son of the devil, Some people say Hitler, But he was more of a leader/Dictator. What do you guys think?