These plants all grow in the Piedmont and may in Upstate, depending on your altitude. They don't all fit every criteria, but they are all beautiful in my opinion. Research them online and make your choice(s):
Awabuki Viburnum - Bloom not showy, red fruit is pretty, grows quickly and has some of the most beautiful large shiny leaves in the plant world. Evergreen.
Japanese Camellia - Look up the specific cultivar to see how much cold it can take. Clemson University has a fantastic collection in their arboretum. Grows slow. Gorgeous flowers in winter(!). Evergreen.
Carolina Cherry Laurel - Nondescript flowers. Pretty evergreen leaves. Grows fast. Native. Self seeds. Leaves smell like Jergens lotion when crushed. Slightly poisonous.
Fortune's Tea Olive - Fragrant but very small flowers smell like apricot cobbler in fall. Leaves are holly-like. Medium growth rate.
Little Gem Southern Magnolia - Large cream-colored flowers with lemony fragrance. Growth slow. Medium sized leaves compared to other Southern Magnolias. Others will grow too fast and too big for what I think you are seeking.
Sweet Bay Magnolia - Apple green leaves, silver underneath. Fragrant flowers similar to Little Gem - a little smaller. Pretty seed cones in fall. Tolerates wet feet. Medium growth rate.
Hollies - Nellie Steven Holly deep green leaves, need a male for bright red fruit, fast growth. Emily Bruner, similar but fruit dull burgundy. Many other good hollies like Oakleaf, Lusterleaf, Lydia Morris, Foster. I do not recommend Savannah, it fruits great but leaves suffer and leaves turn ugly yellow as fruit ripens. All these hollies are evergreen
Wax Myrtle - Fragrant leavess. Fast growth. Insignificant flowers. Loose, not dense unless frequently pruned. Native. Evergreen
Yaupon Tree - Very pretty red translucent berries. Small leaves. Growth not full without frequent pruning. Native. Evergreen.
Waxleaf Ligustrum - Medium to small evergreen leaves. Fairly dense without pruning. Flowers creamy and small, but slightly attractive in season.
Butterfly Bush - Evergreen to briefly deciduous in the south. Beautiful flowers draw butterflies. Not available in large sizes but really wants to quickly grow to 15' tall in the south if anyone would let it. Silvery leaves are quite attractive.
Hardy Orange - A relative of the real orange. Glossy green three-part leaves. Fragrant orange inedible fruit borne at Christmastime. Deciduous but wicked huge thorns stay bright green all winter. Seems like it would die in the cold but its hardy to PA. Good burglar bush.
I would pick three to five of these species and mix them up in an irregular hedge line, two to three plants deep and offset, if you have room. That make it seem less like a prison wall once it grows in.