you might even be able to get a castorbean to grow.I grew one behind house in shaded area for 'mole patrol'.didn't grow my red back there,just the red veined one.
maybe some bamboo.
Camillia
chinese witch hazel
Azealias(native)
Mountain Laural
Japenese Skimmia (has red fruit in winter)
Dogwood
Dwarf Forthergillia
hygrandea
sweet spire
japenese kerria
japenese aucuba
fatsia
japenese pieris
sweetbox
Viburnum...blackhaw& others
abelia
foam
flowersBergenia(great in the winter too)
Lobelia
impatiens(and african hybrids)
rocket ligulira
bugleweed(some foliage turns purple/black in winter)
goatsbeard
corydalis
on the otherhand......I love your view.hows the fishing?You need a pier.