Answer: Plant selection is always a bit of a process of elimination. Determine how much sun the plants will get. Will they be in full sun year around, or will they be shaded by the neighbor's garage? You might want to prop up some type of temporary barrier/stakes/trellis, etc. to see what height you need, since I can't predict from the information you've given. It also wasn't clear if you wanted a hedge row type of screening, or 1 or 2 single larger plants. Holly makes a good evergreen screening plant, singly or as a hedge. I agree that tangerine crossvine wouldn't like your cold winters. It is hardy to zone 6 with average annual minimum lows of minus 10 to 0 F. If you get colder than that, it wouldn't survive. Hope this info helps.
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