Need ideas on next purchase?

Not sure what fish to add next to my tank. Looking for something coral safe and non aggressive, tank specs 55 gallon reef with a 15 gallon sump and a ten gallon fuge(one week old). So far I have a
yellow head goby
scooter blenny
chromis
cleaner shrimp
and my CUC.
Also not looking to add clown fish yet that will be down the line.

 

yellow watchmen goby

firefish

scissor tail

 

these are cool
Saltwater Aquarium Fish for Marine Aquariums: Orchid Dottyback - Tank-Bred

i have a couple of these thay are neet
Saltwater Aquarium Fish for Marine Aquariums: Kaudern's Cardinal - Tank-Bred

this is just cool looking
Dragon Sea Moth

so manny choices all fish are cool to me in one way or another there disposition is always another factor IMO . thats why when i go to the lfs ill watch there stock and make my choices based off there actions im shure alot of us here do the same thing

 

The dragon sea moth isn't exactly the best choice for a random reef. They're better suited to a species only tank, or another tank designed around them.

 

court jester goby?

 

The dottyback will be the king of the tank and possibly terrorize the rest of the fish.

A canary wrasse, fairy wrasse

 

thanks for the suggestions but a lot of you guys are saying another goby. Would it get along with my yellow head goby or will it cause problems?