I would not combine gourami with Emperor Tetra
. The latter are quite active fish, and this can unsettle sedate fish like gourami. Either or. If the gourami are chosen, one male and 2 females would be best.
With these, the rummys should be fine; they stay near the bottom and the gourami are upper water fish. Lots of floating plants for gourami.
For another mid-water fish, one of the medium rasbora would work. Rasbora are peaceful and rather sedate fish too, and spend their time in the upper half of the tank. Not the "dwarf" species though, as they will be eaten.
After coming across your second post, and merging that in to this thread, I see Panda Garra
is also mentioned. This is not at all a good combo with the other fish. The Garra occurs in fast-flowing mountain streams, so it needs a decent current and cooler water. The gourami would perish in this (both aspects).