Can Dwarf Gourami be with these fish?

I have a 30 gallon tank with 2 platies and 5 red eye tetras 4 neon tetras and 3 tiger barbs. I know they are schooling fish and need 6 or more, we are not adding all the fish at one time but can dwarf gourami be with these fish. If so how many should I get. I have had this tank set up for a while and the reason why my tank is not fully set up is because our tank had got ick from the pet store all the fish we had didn't make it. The tiger barbs haven't bothered and of the other fish they all get along. We have had our tank for almost four months.