New fish suggestions

[Wayne]

Hello all, I am about to jump my aquarium size by 20 gallons with a sump, so I am considering a new fish. I will be into a 52 Gallon tank. I currently have a Citron Goby, Dusky Jawfish, 2 Blue Chromis, there is also a Cleaner shrimp, Brittle Star Fish and lots of crabs, snails, ect.

I am looking for something that isn't aggresive (tank mates are all docile) and does some cleaning! Preferably something that eats bristle worms aswell as mysis shrimp, flakes, well anything really

Any fish coming to mind that fits the bill?