Forum:Corvus. What Species?

I'm not sure what to make the character Corvus. I know I want him to be a former Covenant Soldier, but I DON'T want him to be a Jiralhanae (hate those F-ing ape-things), and I think Sangheili are......overused. I was thinking maybe a Skirmisher survivor (they were NEARLY wiped out, not wiped out completely). Anyone have any other ideas for what he could be. I can't seem to make a final decision.