If I had that tank I would put some South American Leaf Fish Monocirrhus polyacanthus
in it. But thats just what I want here and now. I'm not saying you should get them.
I want to have a go at breeding these strange fish. But care is difficult as they only accept live foods.
For a community setup... I would create a planted tank and add 5 - 6 Corydoras Sterbai/trilineatus, 2 Otocinclus ( for algae issues ), and 6 - 8 dwarf pencilfish... Brilliant...