Mandalore the Ultimate

Mandalore the Ultimate was the leader of the Mandalorian Army during the Mandolorian Wars and the main antagonist in the Knights of the Old Republic comic book series.

Mandalore was once a soldier under the command of Mandalore the Indomitable. When the Indomitable died in the war against Exar Kun, the Taung wore the Indomitable's mask and replaces him as the leader of the Mandalorian clans. Mandalore decides to conquer planets that were defenseless and defeat the Republic.

When they were close to defeating the Republic, a group of Jedis led by Revan and Malak fought against Mandalorian with their leader Revan fighting Mandalore and killed him in battle.