Frankly, Karina. She would defend her people at quite some cost, even reanimating the deceased.
Katuunko comes second. He acted in the best interests of his people.
Julia and Lyonie are tied third. They weren't involved enough to do exceptionally wrong nor exceptionally right.
Chi Cho. He acted how he wanted to, attacking a tribe who didn't want to fight back, but had to because their territory was being trespassed on.
Sanjay Rash. A puppet leader of Dooku's that thought of no one but himself. Even as he was being executed he still asked what he'd get out of it.