Kyle Katarn

Character in the Star Wars Expanded Universe, who appears in the five video games of the Jedi Knight series, the video game Star Wars: Lethal Alliance, and in several books and other material. In the Jedi Knight series, Katarn is the protagonist of Star Wars: Dark Forces and Star Wars Jedi Knight: Dark Forces II, one of two playable characters in Star Wars Jedi Knight: Mysteries of the Sith, the protagonist of Star Wars Jedi Knight II: Jedi Outcast and a major NPC in Star Wars Jedi Knight: Jedi Academy.

Katarn was originally a member of the Galactic Empire, before becoming a mercenary for hire. He regularly worked for the Rebel Alliance and later became a member of the New Republic as well as a skilled Jedi and an instructor at the Jedi Academy, second only to Luke Skywalker.

Katarn has been well received by most critics, with GameSpot including him in a vote for the greatest video game character of all time, where he was eliminated in round two, when faced against Lara Croft.

Wookieepedia:
Kyle Katarn was a famous Human male Rebel operative from Sulon and later a Jedi of the New Jedi Order. He was a former Imperial stormtrooper who defected to the Rebellion. Often paired with fellow Rebel agent and smuggler Jan Ors, he performed many covert missions for the Rebel Alliance and later the New Republic, including the sabotage of the Dark Trooper Project.

Katarn was later informed of his Force sensitivity, and taught himself to become a Jedi while in search of the Valley of the Jedi. During this journey, he confronted the dark side within both himself and in the form of the Dark Jedi Jerec and his minions. After defeating them, Katarn went on to become a Jedi Master, teaching at the Jedi Praxeum. He participated in the offensives against the Yuuzhan Vong and became a part of the Jedi High Council in the New Jedi Order.