It depends on the species of Gourami-- Pearl or Dwarf Gouramis would be fine, but Blue, Gold, and Opaline Gouramis (which are all the same species) as well as Paradise Gouramis can be quite aggressive, so I would avoid them. Also, Neon and Cardinal Tetras WILL be eaten by Discus, so unless you wanna pay $2 for feeders, you might want to avoid them as well. Large, slow moving schooling fish like Black Skirt, Diamond, or Red Eye Tetras as well as Glass Cats. Also, Dwarf Cichlids like Rams, Apistos, Kribs, and Dwarf Pike also make great tank mates.
