In addition to Margaret’s excellent suggestions, you might want to look at red twig (osier) dogwood. It is hardy to zone 3, also has spring white flowers, blue berries in fall and fabulous red stems that look grand in winter. Birds like it. I use it with viburnum, bayberry, inkberry and oak leaf hydrangea along the road for similar screening reasons.
Welcome! I’m Margaret Roach, a leading garden writer for 25 years—at ‘Martha Stewart Living,’ ‘Newsday,’ and in three books. I host a public-radio podcast; I also lecture, plus hold tours at my 2.3-acre Hudson Valley (NY) Zone 5B garden, and always say no to chemicals and yes to great plants.