Fish for filing in my tank

[RezReef82]

what fish would be best to add to my 50 gallon Landen that would occupy the upper section of the tank. I have a red a purple fire fish, 2 regular ocelaris clowns a one ora hybrid indigo dottyback. Also have some lps a soft corals(2 hammer corals one of which is a good sized colony, 1 octospawn, 1 frogspawn, 1 Duncan, 1 good sized Kenya tree, some zoas, one blast frag an a acan frag so they need to be reef safe.
Tank measures 36long by 17.5 high an 17.5 wide

 

[littlefoxx]

Chromis are very active and would add movement

 

[Gumbies R Us]

Royal gramma!