Darth Berserkus

"The force is a tool to be used, both sides."

 was a Sith who lived during the clone wars, he thaught himself after he left the Jedi order, since he thought the Jedi idiots who could not make peace with their enemies and use the force as it should be used.

Early life
Darth Berserkus (or Thrak as he was called at the time) was born on the world of Zygerria, he was taken in as a slave and as he grew older he became a gladiator.