I am looking for something that would make a 20' to 35' tall privacy screen. Agressive rooting would be a plus as I'm planting along the top edge of a large hill. Also, medium to wide span would be a plus. And of course, I want it fast. "Weed" trees and shrubs are fine with me.
My main concern is height and speed. I'm willing to sacrifice a little height to gain faster growth. The Washington Hawthorn sounds nice, but isn't as fast as I want. Hybrid Willows grow too tall. Olives aren't quite tall enough, but would suffice if they met my other criteria. The Siberian Elm is a little taller than I'm looking for (around 45'), but could work since it can be trimmed.
I am basing this on reading catalogs/advertisements. However, I'm looking for practical experience now. I live in SE Ohio (Zone 6).
Thanks!