Community Aquarium question? STOCKING!?

First off it would be helpful to know the size of the tank. If large enough (40-50 gallon range) then the gouramis could be kept together, providing there is enough cover for them to retreat to. Again, if the tank is large enough go with 6-8 of the tetras and leave the rams out. I agree with "cat" that you should buy cory cats of the same species.