I have a 90 gallon reef tank and I am hoping to add three banggai cardinals and possibly another good small fish. I have these in the tank now:

Coral Beauty Angel
Scooter Blenny
Green Chromis (2)
Percula Clownfish
Segeant Major Damsel
Dragon Goby
Longnose Hawk
Spanish Hogfish
Blue Hippo Tang
Yellow Tang
Niger Trigger
Leopard Wrasse


What are some suggestions or recommends of fish I should get?