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.
chinese witch hazel
Japenese Skimmia (has red fruit in winter)
Bergenia(great in the winter too)
impatiens(and african hybrids)
bugleweed(some foliage turns purple/black in winter)
on the otherhand......I love your view.hows the fishing?You need a pier.