Darth Imperatos

Darth Imperatos, born as Apollyontiakeloreuntagos, or Apollyon for short, was an At'Azraq male Jedi Master turned Sith Lord, and was one of the founders of both the Old Sith Empire and the Reconstituted Sith Empire.

He had amassed such riches as a sith lord and such power that he was given the title Imperatos by Naga Sadow.

Unfortunately he was killed by his apprentice, Darth Kentar, before apollyon could add his knowledge to the Telos Holocron. However, this was not before he had made three holocrons.