Yes you can put a pair of Bolivian rams but not more than two as this is the absolute minimum they can live in.the water quality should be good also.
You can for instance use driftwood, rocks and densely grown plants to create suitable hiding spots. Including floating plants in the setup, e.g. Watersprite, is a really good idea. If you plan on breeding them you should also include a few flat rocks to be used as breeding sites.
the bolivian ram is a peaceful community fish. Most of the Tetras, Hatchetfish, Corys, and about any other med size non aggressive fish can be put with them. I would stay away from the very small fish such as neons as they may become a meal. I think any of the Danios would be allright too. I would probably stay away from most of the barbs due to their fin nipping habits.