More than likely, depending on the "community" fish you have, you could keep some rams, or apistogramma. But, you won't be able to keep either of these with Cherry Shrimp.
You will deffinately need more corys. I have read some issues of apistogramma/rams with corys, but only in breeding in a small tank. If you only want 1 of the cichlids, then the corys will be fine. But none the less, you need more corys.