Some that come to mind are the many kinds of astilbes (I especially like the vivid ones in the species chinensis var. taquetii); cimicifuga (various species, all with creamy fragrant plumes or wands); Japanese anemones (late summer into fall); monkshood or aconitum (again, late) and kirengeshoma (yellow bells in late summer or fall). Some thalictrums will do as well. Surprisingly, many daylilies will tolerate a degree of shade, so worth experimenting if you like them. Ditto with some asters, like white wood aster (Aster divaricatus), again does its thing in fall. Remember to include liberal doses of colorful-foliage plants into your designs to make it all hold up between blooms. Various blooming shrubs, like many hydrangeas, will do in these conditions for more punch, and of course leaving room for annuals if you want maximum summer color.