To answer your question, honey and sparkling gouramis are indeed very peaceful fish and do well with easy going tank mates; I see no problem keeping them together.
However, I would caution you when adding honey gouramis to your tank if you haven't already done so. The
colisa chuna are extremely shy and skittish fish; fast, semi-obnoxious fish like danios will stress out the honey gourami. They will hide and may not feels safe enough to eat. If you decide to add them, make sure at least one section of the tank is very heavily planted with
tall plants - surface floating plants are also helpful. If they have dense vegetation that they can relax in, then after a few months they'll get used to their tank mates. You'll also want to watch very carefully that these dudes are eating and not being overpowered by more aggressive eaters.
If you're willing to baby them a bit, I think they're totally worth it. They are incredibly sweet fish and are really fun to watch. I know that was more than you asked, but hopefully it's helpful info.
Edit: Just noticed you already have the honey gourami in the tank....