That looks like a great tank for a couple Reedfish and Bichirs. Fun places to hide. In my experiences, those two types of fish are gentle to the plants even though they go through them a lot. It just looks like a cool tank for long and serpentine fish. A Ghost Knife would be cool, too if it can get out of the light that you need for those plants.
How about some Bolivian Rams, a small species of peaceful knifefish (lots available), and a school of larger tetras like Bleeding Hearts or Bloodfins..