Privacy hedge:
--Korean pine will (eventually) grow pine nuts, but it's also a slow grower and not very dense.
--Elaeagnus x ebbingei makes a good hedge, topping out at about 6 feet. I have yet to see those mythical berries.
--I'd totally go with camellias for a hedge - the foliage is pretty and you can pick your height. You might consider mixing multiple types - there are some non-tea varieties that bloom in mid-winter which is cheering, others have more beautiful blooms, and tea camellias have less beautiful flowers but obviously the leaves are useful. I believe all camellia flowers are edible. If I could keep them alive in my garden I'd have tons.
Groundcover:
--Creeping thyme (some varieties) is nice, not as sturdy or spreading as one could hope, but useful here and there.
--I personally don't find bergenia attractive, but I inherited it and it makes sure it's the one part of the garden I don't have to weed, so it's staying. The flowers are striking and the leaves are edible "as a famine food" according to PFAF.
--Moss
rose is pretty and theoretically edible. I haven't tried it yet.
--Kinnikinnick is a plant I have much more appreciation for now that I'm out of its
native habitat and not seeing it everywhere.
--Winterberry is cute. I've never been able to get it to spread.
--Creeping rosemary is barely hardy to zone 7, but useful and pretty.
--Prostrate junipers were mentioned above. I find them kind of boring, and grass will peek through and then you need to wade through the prickly stuff to pull it. However, great for holding hills down and keeping most weeds out.