Both fish in question (black and Neon tetra) require water of pH 6-7.5 and KH 2-10 @ Temps of 75-82F so unless we know for sure (meaning by test) that your water is soft, I'd have high doubts they'll thrive in your water. and in either case, they're school fish and you should not keep no less then groups of 8 min.
I'd not recommend no more then 2 Gouramies in the tank and 2 only then, if the tank is WELL planted, meaning some easily 60-70% plant coverage throughout for hiding (to avoid aggression attacks between them and the betta gal)
The Danio's will do fine also in harder water, IMO a MUCH better choice for your tank. However there again, they gotta be kept in groups not singles.
The problem I see coming in this set up / your wishes is simply the fact that you chosen only those fish that occupy the same water levels, rather then picking a stock where some will live on the bottom, your Gouramis & Betta gal in the middle and someone else up top.
Were this may tank (and obviously its not) I'd have the Betta Gal & 2 Gouramies. A school of 10 Cory's and a group of 5 silver Hachetfish if the water allows it.
The glass shrimp aka Ghost shrimp are simply going to be regared as live foods offered by the Gourami. So adding them to KEEP them is out of question there.