fish Suggestions for Nano?

[Oscar]

I am going through a rebuild on mY 39g tank. Sunoka relieved me of my urchin who was bulldozing my rock and breaking coral. Soon I hope to get rid of the reef lobster who is a nasty bit of business. Once he is gone I can re aqua scape and add some wildlife.

So I hope to restock with some new inverts and fish. I currently have two clowns. I want to replace my yellow clown goby, lobster must have got the first one.

Considering a goby, Bennie, yellow tailed damsel. Also Looking for a small, calm herbivorous fish to keep algae under control.

What would you suggest for a nano?