Leopards (like viviens), tamarins, pencils, coris wrasses and others sleep in sand and use the sand as their safe haven, so bare bottom, while possible, might not lead to healthy/happy fish. May lead to injury if they get spooked and dive into the non-existent sand
Cirrhilabrus (fairies), Paracheilinus (flashers), Pseudocheilinus (e.g., six-line, mystery, etc., generally can become territorial), Pseudocheilinops (pink streak wrasses, adorable but shy and need peaceful tank mates), and Wetmorella (possums, similar to pink streaks in tank needs) are all wrasses that sleep in mucus cocoons in the rockwork. Cleaner wrasses too, I think. They would be good for a bare bottom tank, although pinkies and possums might get lost in a large tank like that.
Good guide to picking out fairies: