Maul

Maul (Also Known As Darth Maul) was sith apprentice to Darth Sidious and later became ruler of Mandalore and leader of the Red Key Syndicate.

 Apperances: 

Bafta: The Strategist

Bafta: The Guard

Star Wars Episode I: The Phantom Menace ( First Apperance)

Star Wars The Clone Wars

Star Wars Rebels

Solo A Star Wars Story