Forest Pansy Redbud, another one that is variegated though I can't remember the cultivar name is really neat and eye catching also.
Another great tree that stays on the smaller side but isn't commonly planted is the native fringe tree, Chionanthus virginicus.
Tall shrubs that would look good would be red twig dogwoods. Like the name implies they have red twigs that are fully exposed in the winter time providing winter interest.
