Nice pic, Alf2!
My Maroon clown has hosted with, in no particular order, a Gold Crowned Toadstool, 2 different Open Brains, a bubble coral and fuzzy shrooms.
My various Percs and
Ocellaris clowns have hosted with star polyps, fuzzy shrooms, Ricordea, Capnella and a
branching Hammer. One of the little Oscellaris fell in love with a large Hawaiin feather duster and it was the funniest thing I've seen to date in my tanks. He would just lay on the duster and when it would close up with that circular motion he would go round and round with it until the duster closed up enough to get back in its' tube.
I would just pick the corals you like for your tank and your clown will figure something out. If the coral seems irritated by the clown's attention though, you may have to "encourage" him to find something else.
Alice