What light do you have? Clowns can get very aggressive when it comes to an anemone mine wasn't when it was hosting an acan but now with an anemone it gets a little nippy with me. Every fish is different and remember some host and some don't doesn't matter if is tank raised or not.
For a low light tank something like mushrooms. leathers and LPS
like frogspawn. torch and acan. Zoas are a good choice as well. I would stay away from green star polyps, encrusting gorgonian, blue cloves, xenia and waving hand because they can over tank the tank.