If I had another 10 gallon, I would stock as the followings: 6 Cardinal Tetras, 2 Clown Killies, 2 Peacock Gudgeons. The tank would consist of lots of plants.
I kept gudgeons. Be forewarned that they grow to 4 (or a little larger), not 2 and a half, inches. I loved mine, they are beautiful and fun to watch, though both were aggressive, and they are supposed to be peaceful. However, I have a knack for getting fish like that. Check my sig.