Answer: I can think of "Sky Pencil" holly, Ilex crenata "Sky Pencil" (sometimes called "Sky Sentry".) This evergreen shrub grows about 6 to 8 feet tall and is very narrow, only 12 to 18 inches wide. It is considered winter hardy to zone 6.
There is also the pencil cholla, a cactus, but it would not grow in your area.
That's all I can come up with.
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