Reef Fish Suggestions?

[solid14th]

I am looking for some advice on the last fish to add to my tank. I have a 120g (4x2x2ft) and the current inhabitants are: Kole tang, ocellaris clown, citron clown goby, yellowtail damsel, bangaii cardinal, 2 cleaner shrimp, 2 peppermint shrimp and variuos snails.

I want fish that are going to spend time swimming in the water column. I only feed once a day (so I think this rules out any anthias). My dream fish is a Powder Blue tang but I am afraid it will bully the Kole tang. Is this likely and if so any other suggestions?