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As far as the gouramis I've ever had, they've often been the nicest and calmest in my tank.
Their beauty creates a soothing effect as they calmly glide through the water. I'm not sure I would add 1 different kind of gourami (just in case), but adding 2 shouldn't be a problem.
Sparkling Gouramis and Honey Gouramis are pretty well behaved, so I think you'll be fine adding in the Honeys. Dwarves and some of the Opalines can be a different story though.