Aquariumgirl's Nano

[Rikko]

There are some small dottyback species that might be alright, but they do tend to pick on crustaceans.
The only other fish I can really think of that might be out a little more would be a smaller blenny species - but even they would probably have to get moved out after some time. Maybe not a huge deal though - if you can find a tiny bicolour blenny (hands down my favourite marine fish) you could probably have him several months before he starts getting to a size where you'd want to find him a bigger home. Then you could start again or find another species (like so many people do with goldfish).