Best fish for a 30 gallon tank?

Hello everyone! I was wondering what are the best fish for a 30 gallon tank. I currently have a Coral Beauty, a Fire Shrimp, a Goby, an Emerald Crab, and several Snails and Hermit Crabs.

I am planning on adding a clownfish in the future. I am aware i cant add much more but i am looking for maybe 1 or 2 more fish, any suggestions would be much appreciated!


Thanks!