Probably Kamara.
I have a strong feeling our offense will be drastically different from last year, at least without Ingram. We ran a run-heavy Smashmouth style last year as our strength. I think we will go back to an offense favoring the pass at least early in the season before Ingram comes back. Kamara can be used for screens and explosive plays in a way we used to do with Bush, Pierre Thomas and Sproles.