Jonah

Jonah was a human male Jedi. He was the last Jedi during the existence of the Galaxy. He was originally trained by Sennon, head of the Jedi Order. He was present at the murder of Sennon while he tried to negotiate a compromise that would prevent the different factions of the Galaxy from going to war around 25,000 ABY.

He was a peaceful person by nature but, during the Third Galactic Civil War, he was captured while on a diplomatic mission and tortured to the point his mind snapped. After that, he went on a rampage, bent on punishing the galaxy for its treachery to his master and himself. The Galaxy, twelve years into their war, made a truce, in order to focus fully on Jonah.

Jonah became so powerful; he could repeal laser blasts from space cannon with a single flick of a finger. He crumbled planets and destroyed fleets. After destroying the different factions of the Galaxy, he slaughtered both the Jedi and Sith. In a rare instance, all the Jedi and Sith banded together to stop him. He killed every single Force holder, and then killed himself, reportedly saying, “''I am the Jedi. I am the Sith. I am the Force. I am Jonah!”'' With his death, without someone controlling the Force, it collapsed, destroying the Galaxy.