Hi,
My tank has a Dory ... Blue Tang obviously, yellow tang, 2 clownfish, a fairy wrasse (1 jumped out), a diamond goby (1 jumped out), a couple of Peppermint shrimp (populated it with 10 but pretty sure it's down to about 2), a Mandarin Goby, goodness knows how many snails ... populated with about 15 turbo snails ... not sure howmany left, populated a dozen conch snails. a foxface rabbitfish, and a cleaner shrimp. Oh almost forgot, a red linckia, a serpent seastar, and a blue Goby with a pistol shrimp.
Yeah maybe they can be clean up crew .... but that's a lot of uninvited guests. I told my wife we may have an algae bloom if the water chemistry goes bad without them, but I'd rather fix the water chemistry with something of my own design.
They were just too big. The store that built my aquarium wanted me to leave them alone (that's why they lasted a year hehehehehe). But they had to go.