Next Fish for 120

So i have a 120 gallon thats been up for about 2 months. I transferred rock and everything from my 65 gallon so the cycle was not much.

I just want peoples opinions on some fish to look into. It is a LPS and softie reef tank. Right now I have the following fish

Clown fish
6 line wrasse ( has been very peaceful and really almost scared of the other fish)
3 green chromis
yellow tang
Royal Gamma Basslet

I am planning on getting 3 cardinal fish this weekend but then after that i am not sure what i want to get.

any opinions from anyone. Would prefer the fish to be non aggressive and obviously coral safe.