Honey Gourami x 1 or 2
Celestial Pearl Danio x 20
pseudomugil paskai x 10 (all males if possible)
Any group of 6 cory cats
Chili Rasbora or Ember tetra x 15
That would be very well stocked, but manageable with 50% water changes, 78 degrees F, and a well cleaned filter / gravel vacuumed tank.
That is what I would personally do.
You can go with some Preacox rainbowfish, 6 - 8 of them, or Skull Creek rainbowfish (try for all male rainbows) as well, with CPD's, ember tetra, cory's and a small Gourami.
Amano shrimp x 10, oto cats x 6.
You could do a pair of rams, cardinal tetra and sterbi corys with the temp set to 82 degrees.
You could do a pair of apistos with ember tetra, dwarf rainbows, cory cats and oto cats.
If it were easy we wouldn't be here