Thuja Green Giant. Limited height screening/privacy. 20-35 ft. tall. 8-12 ft. wide. Plant every 5-6 ft. Grows in uniform shape and height. Don't have to do anything to them. Drought tolerant, no significant insect or disease problems. Not prone to deer and bagworm problems. Grows in almost any soil, even sandy loam, heavy clays. Prefers direct sunlight. And does well in partial shade. Make sure grown in pots and not topped off.
If you are looking for privacy and noise reduction for your yard a bamboo hedge may be right for you. Bamboo is wonderful for hedges since it is fast growing and the bamboo canes grow close together. Bamboo is also a beautiful plant that will enhance the look of your yard. (also, look! they have clematis growing in it. I like!)