I agree with others on the Dwarf Gourami, this is a fish best avoided unless you can obtain it direct from a reliable breeder (not a store). Honey Gourami do not have the virus risk, and are similar in size. All male gourami are territorial, some species much more so than others. Honeys would be fine in a group of say one male to two females, or similar ratio if more. Gourami are sedate fish as mentioned, and do not want active swimming tankmates, so if the gourami is a definite, I would forget any barbs and danios (thinking the common species here). Rasboras are good tankmates, as they are not as rambunctious.
Assuming "Gold Barb" is the species Barbodes semifasciolatus [used to be known as Puntius semifasciolatus until Kottelat (2013)] it is an active swimmer and needs cooler temperatures (75F max but lower is better) so not good with warm water fish like gourami. It would not be problematic for the Harlequin Rasbora (Trigonostigma heteromorpha) which although a rasbora is a bit more active than most in this group. And no problem with temperature provided it is not below 70F.
This temp also suits the panda cory, but cories should be over a sand substrate, just so you know. This cory is also one that really does like some water current (because of its habitat conditions) and this should not bother the barb nor rasbora provided it is not excessive.
As for group numbers, these three are all shoaling species so the more the merrier (which means better health due to less stress) and you have the space, so 12-15 cories (you could have other species included, they all get along, and up to 20 or so if you like), and 12-15 of each of the two cyprinids (rasbora and barb).
Your post #9 appeared as I was typing...the gourami is just not compatible with any of these others as I have mentioned, and you could I think have a very lovely tank with these, they have shared requi9rements and that is very important to fish health. The water flow issue is another.
