A pair of Watanabei angels and loaded with wrasses and a couple dragonet pairs once the tank is mature. I don’t know why, but those were the first fish that came to mind. Definitely Acros up top with Chalice and unique aggressive LPS (e.g., Platygyra, Favites, Acan Echinata, Bowerbanki) colonies I can’t keep in a small tank below with enough space to keep them from killing anything.