This is a 29g so water flow will not be excessive and it is easy to find something suited to cories and gourami. You could have a dual sponge filter connected to an air pump which is pretty much minimal water current, or a step up with an Aqueon Quiet Flow which would allow placement in a rear corner and current thus directed across the back to the opposite end and back again, and by the time it reaches the front it is pretty low flow. I used this well in my cory tank. And the honey gourami is OK, some more sensitive gourami might not be, but not here. Pictures below.
Neons, or cardinal tetra or the green neon tetra are all good (not mixed, better with a single species), you want 12-15 of whichever. The species (some of them) in the "Rosy" clade in Hyphessobrycon, such as the Rosy Tetra, in a group of 10-12 would work. Just avoid the troublemakers in this genus, esp Serpae Tetra (fin nippers) and the too large Bleeding Heart Tetra. The two phantoms, Black and Red, are in this clade. With most all of these you want at least 10-12. None are active swimmers.