Deutzia is a good choice. There are different cultivars in different sizes but I have Chardonnay Pearls that only gets winter and early spring sunshine then it's in shade until the leaves fall. Same for my Miss Kim lilac. Some Azaleas also would be good. They usually grow at the edge of the woods.
Azalea Bollywood and Azalea Weston's Parade are a couple smaller ones.
