snails will be your primary crew. Get some astrea and some cerith. You shouldn't need more than that. Oh ya, a turkey baster. You're all set. You won't get a bunch of critters to keep things clean for you, you're gonna have to help
Ina 10g, you're limited, such that you can't really keep conches, brittle stars and other common cleaners. Even urchins will move things around too much in a smaller tank.