60 gallon breeder stocking ideas.

I have my 60 gallon breeder tank that I intend to rescape to better accommodate its current occupants and so that I can make room for some new tank mates. I currently have 3 bristlenose plecos, 14 Schwartz cory, 12 rummynose tetra, and 3 rabbit snails. Tank is kept at 78f ph 6.8 I want more fish to occupy the middle to top of tank. who can I add?