[fishytime]

I will echo some of the suggestions and add a couple of my own....

flasher wrasses are great little fish.....pod eating machines.....a bit of a flight risk so a top for the tank is recommended
firefish are great little fish too ....can be secretive and can be out in the open, depends a lot on tank mates....severe flight risk
grammas are great
assessors are among my favs
stongiobiops (yasha/ dracula) goby/ pistol pairs are cool.....flight risk and need sand
jawfish are cool....flight risk and need sand
as for as a small algae eating fish..... tailspot or bi-colour blenny......lawmowers and starry blennies are good, but may be borderline too big for your tank....all blennies are flight risks

I would not recommend any dragonet/ scooter blenny for a tank that small .....UNLESS you are 100% certain it is eating a prepared food....also would not combine the dragonets with wrasses, too much competition for food.....I know someone will chime in and contradict what Im saying, but people being successful with these fish in smaller tanks are the exception not the rule....

I would also not recommend the hectors/ranifords gobies.....they are a very difficult fish to get eating a prepared food and more often then not end up starving out....

Damsels is evil....plain and simple.....