Clown gobies, neon gobies, most watchmen gobies, pistol shrimp (don't trust with other shrimp), firefish (prone to jumping - make sure your tank is covered), ocellaris or percula clownfish, red legged hermits, blue legged hermits, scarlet hermits, skunk cleaner shrimp, fire shrimp, peppermint shrimp, coral banded shrimp (don't trust with other shrimp).
Make a list of what you want for your final stock, but be prepared to whittle it down. Most people make the mistake of adding too much to their tanks. Regardless of size, they all fill up fast with livestock! if you post your likes, we can help you make wise choices.
Do you have the lighting for any corals?