For a nice dose of color, you might consider a Threadfin Anthias - Nemanthias carberryi. They love to shoal together, and having a harem in captivity is quite possible. Only one male should be with the harem (four or more), to avoid any fighting. This fish has a high metabolism and needs to eat frequently, two or three times a day, and needs very good water quality. This was my third attempt to keep this fish, and was a keeper. (The previous two died almost immediately upon being added to the tank, possibly due to acclimating too slowly. They need plenty of oxygen, so have the LFS bag it in a large bag and add air to the bag. Acclimation should be done very quickly.) They are jumpers, so a cover may be necessary. Reef-safe.