I have English Ivy which works very well as ground covers for trouble spots. Let me know if you want these. I also have some extra Oregon Holly if you want.

English ivy is EXTREMELY invasive and highly discouraged. Try Boston ivy (Parthenocissus tricuspidata) or Virginia creeper (Parthenocissus quinquefolia).
Most native shrubs will grow vigorously. Crabapple (Malus fusca), and several varieties of blueberries, salmonberries, some varieties of currents, amelanchier, elderberry, high-bush cranberry, kinnikinnick, and bunchberry (Cornus Canadensis) are native to your area. Look for a local native plants book, or my bible: Plants of the Pacific Northwest Coast, Washington, Oregon, BC, and Alaska by Pojar & MacKinninon. Good Luck!