Fish suggestions

[Nano]

So I'm trading my chromis tomorrow for coral. So that opens up room for a couple fish in my tank. Now I want to do this right, and get the best possible fish and the most colorful/beneficial to the tank. so any suggestions are more then welcome. Current stocking list includes
Scooter Blenny(Dragonet)
2 Ocellaris
4 Chromis(will be gone tomorrow)
1 Bangai Cardinal

So basically I am looking for one or 2 more fish to add. I will also be getting a new Cleaner shrimp if I can find one for less then $30 this time! Now that I dont have the stray voltage problem anymore, I am confident in keeping one alive.

No sand sifters please as my sand contains sharp shards in it, and if I keep the sand, I'd rather not harm the sifters. angels are a consideration, but I would love to hear what type and experiences with them in a reef if they are suggested. Again if you missed my build my tank is a 35g Cube 20g sump/refugium any other info needed let me know

Thanks as always guys