Fairy Wrasses are indeed invert safe. They are extraordinarily peaceful-except to conspecifics. However, they also require quite a bit of swimming room as they are very active. Fish that are not tremendously active swimmers do better in smaller tanks.
Perching fish like hawks or small gobies, Psuedochromis, grammas-fish that mainly 'hang out' A firefish Gobie hangs in the air and is very attractive as is the purple psuedochromis or royal gramma. A pair (male and female) of PJ cardinals would work as well and their coloration is pretty 'exotic'. OR-a jawfish or gobie would work if you have a sand substrate. You could do a specimin tank with just your clowns, an anemone and add some shrimp, a serpent star, etc. and have a wonderful tank.