You can attempt viridis but it will need to be potted and come in for the winter and may require supplemental lighting. Same for caapi, coca, iboga, any of the warm climate species.
Trichocereus is a great option, you will either need to devise a greenhouse setup that will prevent them from freezing or bring them in and let them go dormant for the winter.
Certainly plant out an Acacia acuminata and an obtusifolia and any other of the more hardy varieties you can find. They are great nitrogen fixers in any garden.
Desmanthus illinoensis and Phalaris arundinacea are plenty hardy without any cover in zone 7.
You can look into morning glory or passiflora for fencelines or create trellises. They are likely to reseed themselves, but the latter may require taking a cutting to bring in over winter.
You can also try some woodloving mushrooms in a woodchip bed, or even some standard cubies in a well mulched garden, assuming you can provide enough moisture.
Salvia divinorum does fine in a pot in a sunny windowsill over the winter.
Most changa herbs should do fine in the ground with little attention.
Just a few off the top of my head, hope it helps