The bright-colored and moving in the flow: white xenia, pom-pom, other kinds (GARF says, that 3 kinds, attached to the same rock, are popular, if I recollect right), red or other bright mushrooms, gsp - the same (I was told that there are different kinds of GSP, never seen myself), best of the zoas. I like anthelia too, but it's considered by some to be a weed. White lemnalia - low light. Purple lemnalia, if it survives in your tank.
Anything bright.