Trees and shrubs transplant well in the Fall. So if you have the space, now is the time to put in camelias, rhododendrons, roses, viburnums, blueberrys, huckleberries, crabapples, and flowering cherries. A witch hazel would do well, I think, and will bloom in late winter or very early spring. There are also some very early blooming camelias and rhododendrons--but check with your nursery for cold-hardiness. "Christmas Cheer" is a rhody that here in the Pacific Northwest will bloom in February, sometimes as early as January. It is more sun tolerant than most rhodies--but don't know if it will survive your Wisconsin winters. You will do better with cherries and roses there, than we do here (too wet in the winter here).
There are a lot of bulbs that can be planted in the Fall--tulips, daffodils, anemones, colchicum, crocus. Bulbs are marvelous--you can have flowers almost every month of the year with bulbs!