There are about half a dozen species of Gouramis that are commonly available. Some are more aggressive than others.
Tricopodus trichopteris is the 3-spot Gourami and all its color variations- Gold, Cosby, a few others. 5-6" long. Among the most aggressive. I had one of them try to claim all of a 6' long tank, 125 gallons. Only the Cichlids would stand up to him.
Tricopodus microlepis is the Moonlight Gourami. 6" long. They can be a little aggressive toward each other, or might be mellow. You could try 1M + 1-2F as long as there are hiding places high up in the tank- tall plants, driftwood... WATCH them- I had one male that got along OK with one female, but when she died he would not tolerate any other upper level fish in his territory.
Trichopodus leerii is the Pearl Gourami. 5" long. These are among the most peaceful of the larger Gouramis. You could try 1M + 1-2F, but have a back up plan, just in case. As with the Moonlight, hiding places, territory markers and so on in the upper area can help.
Here is a link to the Dwarf Gourami. Scroll down to read about Iridovirus. The Dwarf Gourami you knew 20 years ago is not commonly available. They are now short lived, delicate, and not worth getting unless you can find a private breeder.
They are very aggressive toward all other Anabantoids. I have even heard of more than one that had to be kept in a separate tank because he chased and attacked all the other fish of all species.
Trichogaster lalius (Dwarf Gourami) ? Seriously Fish
Trichogaster chuna, the Honey Gourami is a better fish in the 'dwarf' size range. While the males can be aggressive, they are not usually as aggressive as the Dwarf Gourami.
Hybrids including Honey Gourami- May be sold as 'Sunset' Gouramis or other names. Usually yellow or a garish orange, not the soft rich color of the Honey Gourami. I am not sure how aggressive they are.
Yes, there sure are other related fish.
Paradise Fish- As aggressive as the 3-spot or Dwarf Gourami. Perhaps more aggressive.
Betta splendens- Keep only one per tank. They might or might not work with other (non Anabantoid) species, in a community tank. A few Bettas are too aggressive toward the other fish, but it might work the other way, too- Bettas are too slow swimming, and their long fins can get nipped by the other fish.
Lower tank Gouramis- Chocolate, Licorice, Croaking and so on... VERY interesting group of fish! But they are not upper tank specimen fish.