Arborvitae (Thuja) grows to a narrow, conical 40 to 50 feet tall. It begins with a slender shape, then turns spirelike upon maturity. Many varieties exist that grow in various heights and widths. Zones 2-7.
Pine (Pinus) foliage is evergreen for year-round beauty and is composed of bundles of soft, long needles. Though some pines are a bit brittle in harsh weather, they're often used for wind and privacy screening. Hardy in various zones, depending on the variety of tree.
Spruce (Picea) trees are fragrant needled evergreens -- perhaps the ultimate Christmas tree. They range in height from dwarfs less than 5 feet tall to giants that tower more than 100 feet high. Depending on variety, the hardiness range extends as cold as Zone 3.