Historically the 3 spot gourami\ blue gourami will bully other fish in your tank. The other gourami's, snakeskin, moonlight pearl and dwarves will fight among the males more than with other fish.
1 male to 3 females will keep gouramies very happy in your community. I have even kept them alone but you will get the best out of them in a small group. They love plants and for them to do their best they will need these as well. It breaks their aggression and line of site so they are calmer and the group dynamic is better.
Beware they live a long time!! So be sure you want them! They are rewarding fish and look good in any tank.