Yet another vote for melanarus wrasse. Easy to come by. Hearty. Attractive. Tough enough to not get picked on but not overly aggressive. Get to a pretty decent size in terminal phase. And yes they’ll go to town on bugs and worms all day and night.
It’s true, they will go after some CUC. Mine took out all my hermits, nassarius, snails, most the stomatella snails, and most the amphipods. This has just kind of opened my eyes to how little those critters actually do though. They mostly just eat biofilm. I don’t worry about left over food. Between my tangs and foxface any food that hits the sand is quickly found and eaten. You want something for algae control, get an urchin. Snails are fairly useless for that. I have a dozen peppermint shrimp on order though....I will however be furious if my melanarus and sixline decide to dine on them all