Totally, would love a royal gramma and I’m a HUGE Lakers fan and it is frankly shocking that I don’t have one yet. Could probably get away with a gramma and a small wrasse. All my fish are very small. And I love flame angels but eveA dwarf angel would be my pick as well. Either a coral beauty or a flame. They both add a color and shape your tank lacks.
You could get a blackcap basslet or a royal gramma? Purple is such a striking color and it really makes these fish stand out.
approximately 48x20x20What are the dimensions of the tank?