Plants really come down to your preferences. One of my favorites is columnea( goldfish plant). I believe it is just amazingly beautiful a readily flowers in vivarium conditions. Its a trailing plant so plant high on the background and let it drape down.

Peperomia, begonia and ferns are all excellent terrestrial choices that take a good beating that tincs and azureus will be dishing out
Heres peperomia caperata

Heres my suntan begonia

Peperomia verscheffeltii