Mollies are likely to reproduce quite a bit, just a situation which could be an issue over time.
Honey Gourami could be an issue, sometimes they will fight. One male with 3 females could be possible. Though if you have issues you may need to rehome some of them.
Do you know the water parameters, (if you have lower pH Cardinals might be better. Also check out Green Neons, they are really pretty too.)
You might consider one beautiful MALE Angelfish to grace the tank.
Also I really have fallen for Silver Hatchet fish. Just make sure a good lid with very minimal jumping out places. I always have liked the Marble Hatchet. But my tank has a black background built in, so I really love how the silver ones pop.
As for the Cories, there are some species which stay smaller than others and you could add more to the group and they are so much fun to watch in larger numbers.