Believe Porte Crayon is the biggest continuous vertical spot that Bill Bright is looking at, though no one knows what his other two sites are. Vertical potential of 2500 feet, but more than likely less than that if built on MPC. Still, if he built there, the vertical would almost certainly be greater than Cupp Run.
Of course if you REALLY want vertical, you could build in southern NC. Jackson Hole style verticals that would be open about once every five years.