Flame angel is cool for a 29, that and a small wrasse or goby. For movement if you are afraid of overstocking, look into a couple cool inverts like cleaner shrimp to make the tank more interesting.
My fiancée has a pair of ocellaris, a mystery wrasse and a purple firefish in her BC29. She asks if she can have more and I tell her it depends what she wants. She usually points out non reef safe fish so it's easier to tell her no to those fish.