what are you looking for exactly? inverts for looks or inverts for cleaning? imo the best cleaner you can have in there would be a bunch of bristle worms. some trochus snails maybe just two. no cleaner shrimp but a sexy shrimp, anemone shrimp, or harliquin shrimp would do great.
also mini maxi anemones or mini carpets. they would be cool in a nano