This is A'Sharad Hett from the Republic comic series, Hett's father had been a legendary Jedi Knight who left the order to become a Tusken Raider, Hett was trained to be a Jedi by Ki-Adi Mundi and was a general in the Clone Wars. After surviving Order 66, Hett returned to Tatooine and rejoined the Tuskens.
Possible spoilers here for anyone who hasn't read the Legacy comics. Many years later A'Sharad Hett reappeared in the galaxy as the Sith Lord, Darth Krayt, shown alongside Hett below. While Hett doesn't have a particularly big role in the Republic comics, the story of Krayt is worth reading Legacy for.