I just planted Jerusalem artichokes along my fence. They get 8-9 foot tall, but that is also in mostly sun.

Sumac loves to grow under the edge of the forest canopy, too.

We have 10 acres of woodland. The taller trees are mostly oaks, black walnuts, walnuts, hickories, native pecans, elms and hackberries. Along creekbanks there are willows and cottonwoods.

The understory trees/shrubs that grow beneath them include redbuds, wooly buckthorn, Mexican plum, native persimmons, sumac, rusty blackhaw viburnum, wild black cherries, roughleaf dogwoods, and beautyberries.

Then the lower layer of plants that grow very low, more like ground covers than shrubs, include Indian currant, pigeon berry, ebony spleenwort ferns, dewberries, Virginia creeper, Gregg's Mist, several kinds of native sedges, prickly pear cacti and several kinds of low-growing native grasses. Then, in addition to the Virginia Creeper (which will climb trees if given the chance), we have poison ivy, greenbrier (its thorns keep poachers out of the woods), native grapevines and peppervines. Our woods are lovely, dark and deep and you cannot see through them. You can only barely see into them except in areas where we maintain pathways through the woods. From our house you can only see one of our neighbor's homes because the woodland blocks the view in the other 3 directions.

We could have nothing at all but cedar trees if we let them grow, but we prefer the other trees and plants to them, so spend a portion of every winter removing the hundreds (maybe thousands) of little cedar trees that spring up everywhere. They are highly invasive and burn like crazy in the winter wildfire season so we don't want them in our woodland, and we especially don't want them anywhere near our home or other structures.

We have one section, probably about an acre in size, at the back of our property (at least 800' from the house) that is nothing but very old cedars, with some of them easily being 40-60' tall. They literally poison the soil so that little if anything will grow beneath them, so the ground beneath them is largely covered in cedar needle mulch and copperhead snakes with an occasional prickly pear cacti plant here or there. When we cut down large cedars, it often takes 3 years before anything else will begin growing in that soil. I'd love to take out that whole acre of cedars and plant something better there, but they are too tall and so close together that if you cut one it just falls and leans against the next closest cedar. It wouldn't hurt my feelings any if a wildfire were to burn through there and wipe out those cedars, but so far it hasn't happened.

American Holly or Japanese Holly will grow in light shade, I don't know how deep your shade is but you might want to check into those. I'm considering planting some to block a view myself but I'm still deciding. I grew Nandina successfully in light shade in the past, I got good color, form, berries & best of all, excellent drought resistance. I just set out some small plants I collected from under an established clump from next door (free plants). Mine is fairly light shade all summer but full sun in winter when the rays of the sun move and the leaves drop but the soil is very dry from the trees.