First of all, welcome TPT community.
Secondly, your Flame Gourami is just fine. I have 2 Dwarf Gouramis and 2 Opaline Gouramis. The Opaline Gouramis uproot and pick at some of the plants but the Dwarf Gouramis do not. I believe the Flame is closest to my Dwarf Gouramis, just bred selectively for its color.
I do not know about the Molly, so someone else will chime in regarding the Molly.
The one fish that I wouldn't touch with a 10 foot pole is a Silver Dollar. They will destroy a planted tank.
My tank journal:
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