Ficus Benjamima and most ficus need good drainage.... did your pots have drain holes in them.?
They should have done well in a hot and humid climate... as well as in the shade. They will stress and drop leaves but once you get the stress figured out they should grow back.
here is a decent article on them.
https://www.thespruce.com/grow-weeping-fig-indoors-1902440
Unfortunately I am in a Mediterranean climate so just about anything that doesnt require a hard freeze will live here. But I have known people on line that have grown dwarf Oranges and Lemons in doors as far up as NewHamphsire. Again WEll draining soil and moderate moisture.
Ferns are another good plant indoors. Just be careful because some are toxic... As are many favorite indoor plants, Diefenbachia, Philodendron, Aloe, Pothos. all are poisonous to children and pets.
Another good indoor plant are Orchids. Cymbidium are pretty easy to care for and forgiving.
But I would suggest to head over to the local nursery and talk to them. There maybe plants in your area happy with the climate that I dont know about.
Oh and I only worked in a Garden shop for about three years a very very long time ago....
deb