There are some compatibility issues with the present fish, so before considering anything new, it would be best to resolve what's already present. And compatibility is a much broader issue that mere behaviour (aggression, or whatever). It involves water parameters (hardness, pH and temperature) and the environment (aquascape).
Temperature issues: white clouds are not tropical, they need cooler water than most tropicals; room temperature and no heaters in the tanks works fine in most cases. Neons are tropical but do better at lower temps than many others, say around 75F. Your gourami should have higher temperatures, along with the Butterfly. The Bolivian Rams would suit the warmer rather than cooler, say 77-79F.
Second issue is numbers. Shoaling fish need several in the group, and while six is often the suggested minimum, having more will always mean healthier more active fish. All tetra are shoaling fish. So are the white clouds. [I'm only considering fish group sizes here, not the other issues that may affect this.] Not knowing the gourami species it is difficult to offer any advice, but some species can get quite nasty to some other fish. And the common Blue/Gold/Opaline/Three Spot Gourami (all these names apply to the same species) can easily devour neons.
The African Butterfly is not a good community fish, as others have noted. Any fish approaching the surface will be seen as food, and you have probably noticed how enormous this fish's mouth actually is when it opens.
Byron.