Red zebra chiclid with mbuna cichlid?

To clarify, red zebras, electric yellows, and electric blues are all mbuna, as well. You shouldn't have a problem adding the zebra, but expect it to receive a lot of attention from the other fish for the first week. You'd do well to rearrange the tank a bit, as the new fish will struggle to establish a territory amongst all the other fishes' domains; shifting rocks around will essentially provide a blank slate so the new fish has a chance.