My mixture of fishes

[Gourami Swami]

You can't get tetras, like perhaps Colombian tetras?
Mollies should work okay, not geographically correct, but your other suggestions lead me to believe you aren't a purist about such things

 

[timeshoy]

Are the tetras not too small to be with GTs? Are they not going to be eaten?

But i can get Trigonostigma heteromorpha, Hemigrammus bleheri, Hyphessobrycon eques.

I want to be "purist" about my tank, but also I want to experience as many fish as I can. And unfortunately I have A TANK, just the one, and haven't figured out exactly what kind of fish I want.

 

[Gourami Swami]

Are the tetras not too small to be with GTs? Are they not going to be eaten?

But i can get Trigonostigma heteromorpha, Hemigrammus bleheri, Hyphessobrycon eques.

I want to be "purist" about my tank, but also I want to experience as many fish as I can. And unfortunately I have A TANK, just the one, and haven't figured out exactly what kind of fish I want.

Many people keep large tall-bodied tetras with their GTs. It is a risk once the GT is very large, but most seem to leave the tetras alone.
The three species you mentioned, are not large enough, and would almost surely be eaten. The serpaes might be just large enough, but I think you will have better luck with Colombian tetras or Buenos aires

 

[Long Island Fish Guy]

To each his own! If it works, it works!