Eastern Redcedar.

Leyland Cypress is faster, but disease-prone, and not too good on hard dry clay. Norway Spruce will take the clay a bit better, but it is far from ideal for it.

Resin

I love witch trees! Have several, LOL

{{gwi:670015}}

The tree on the left is a young Western Red Cedar (Thuja plicata). It likes clay and water. Have several varieties of Leylands. They like clay OK but not standing water. Have a baby Norway Spruce that likes clay and water. None of these like drought.

There's excellent threads about mixing different conifers, broadleaf evergreens and deciduous hardwoods for privacy screens, layering texture color and density so it becomes beautiful and interesting in all seasons.

Set up irrigation before you plant. You'll be so glad later!

Dang, i was hoping it would be the leyland since they are so fast. So red ceadar would be the easiest and toughest? Like i said, its hard pack clay and in full sun and there are some rocks.