Just look at the fish. A. Sebae's are pretty hard to confuse with Clarkii's. Ocellaris clowns can be very mild mannered fish and I think you would be okay mixing clowns in this tank. Some safe bets would be pink skunks, A. perideriaon, alkalapisos and possibly sandaracinos clowns. I'd second that allardi's would probably be too mean and even if you could get healthy Bicinctus clowns they would probably become far too aggressive for ocellaris. Also, if you get a big enough group you may be able to just keep about half a dozen or so Ocellaris clowns if you don't want to risk mixing different species.
I would avoid most if not all from the clarkii complex, the tomato complex. I would definately not put them in with maroons.