I take it you aren't the heroic type lol. And yeah of the many vore games I have played very few have preds in the mc role. Guess prey are too common T^T
(Though not a bad thing for me >:3)
Have you tried Nyan Adventure or God Complex, they have switch mcs? Though you can avoid being prey for the most part, I think there are a few scenes that are unavoidable. Though in God Complex you can churn people instead of having them as companions which seems like your cup of prey.