I'm in WNC also, Macon County, over 2200 feet elevation. Pecans will grow here, but late spring frosts kill any producing buds and I've not known anyone to get a crop. Hickory trees or Hickan (hybrid pecan and hickory) do ok. Even the cold hardy pecans rarely have many nuts. The wild persimmons do well, but the domestic varieties have a difficult time, and have a lot of die back and winter kill some years. I grow Nanking cherry (no pruning, not much caretaking). They are sweet when totally ripe and produce after the first year. I grow figs in a protected corner south side of a building, but they winter kill all the way back to the ground when it gets -7F, then takes a couple of years to recover. I go to the extra trouble for figs because they are a favorite. They need a deep mulch to protect the shallow
roots from drying or excessive cold. Arctic kiwi does well and so do Concord or muscadine or scuppernong grapes, highbush blueberries, raspberries, pears, apples. Peaches not so good, but about every 8 years when we don't get a late killing frost and have a dry fall (very unusual here), we get a good crop. I grow them because they are so easy and grow so quickly, but don't get my hopes up. Then, in years when there is a bumper crop, I can all the surplus I can't use fresh.
Look at what grows wild here: black walnuts, American elderberry, wild blackberry, fox grapes or wild Concord. Ginseng formerly did but has been poached almost to extinction. Shiitake
mushrooms have the perfect habitat here near streams and under mountain laurel or other deep shade. There are plenty of free classes available through the county extension agents on growing shiitake mushrooms.