My neighbor has variagated doogwood on each side of his north facing front steps, which are in the middle of his house. The amount of sun they get can't be more than an hour.

These are a lovely white leaf with green edges, but there are a few varieties of dogwood. They are not too bushy and grow to 5 feet.

Elderberry and yews also do well in the shade

I am not sure about 10 feet but an Annabell hydrangia will get over four feet. It will bloom in shade.

How about full size Goatsbeard? White flower plumes are really nice to brighten a shady spot. From the book "Perennial Combinations" by Burrell, "If you want to fill lots of space in a partly shaded garden, try goatsbeard (Aruncus dioicus), which forms clumps up to 4 feet tall and wide."

Actaea 'Hillside Black Beauty' aka cimicifuga, black cohosh, black snake root. This cultivar is beautiful. There are others that are lovely too - eg., James Compton.

Cupplant, silphium perfoliatum, I have it growing along my fence line in shade.

In some areas, silphium perfoliatum is considered somewhat invasive, I believe.