Dooku (Earth-2042)

"Soon enough, you will stop denying the truth of so very many things. And you will understand that I am not a traitor, but a visionary! Fear leads to anger, anger leads to hate, hatred leads to suffering. But what the Jedi failed to teach you, what I have learned, is how to persevere, to pass through suffering, and achieve ultimate power!"

- Count Dooku, to Obi-Wan Kenobi

Dooku was a male Force-sensitive Human Jedi Master that fell to the dark side of the Force and became the Dark Lord of the Sith Darth Tyranus during the final years of the Galactic Republic. After leaving the Jedi Order, he claimed the title Count of Serenno and, during the Clone Wars, served as Head of State of the Confederacy of Independent Systems. He was the second apprentice of Darth Sidious, the Dark Lord of the Sith whose plan to conquer the galaxy relied on Dooku leading a pan-galactic secessionist movement against the Republic. As such, Dooku immersed himself in the dark side and worked tirelessly to advance his master's plans, but ultimately forgot that treachery was the way of the Sith.

Source

 * https://starwars.fandom.com/wiki/Dooku