Well, here's my 2 cents, I've had experience with Gold gouramis - bought 2 and it never went well, one finally killed the other and I found out (failed to research properly) later that it was a bad idea. Unfortunately the surviving gold was just to aggressive toward my angels so I had to re-home it. I currently have an opaline (blue) gourami with my rams, black neons, flame tetras, and african featherfin in a 55 gal and it completely peaceful and I love it. i have read the temperment of the dwarf blue is such that it will allow itself to be bullied to death without ever fighting back so that has stopped me from adding one to my tank, but I've seen on this site that other people have had success with multiple species. good luck and sorry for the essay