Drive 20 minutes to Beaver Creek. Steeper terrain there.
That being said, there are some places with more exposure at Vail, but you need a local or a guide to find it. Also, unless you really know what you are doing, have avy gear, and have someone to guide you, forget the East Vail Chutes. Several people are killed there most seasons, but it is reputedly quite steep (and prone to slide).
There's not much terrain in Colorado similar to JH. You can catch the Lake Chutes at Breck (as steep as anything I skied at JH, but shorter), E chair at Breck for bump/tree skiing, hike the North Pole at A Basin, ski the Pali chair or north side of Montezuma bowl at A Basin, hike Highlands Bowl at Highlands, ski the Hanging Valley at Snowmass, etc. But, in general, you will not find the variety, length, and pucker power of the terrain at JH (or Snowbird, for that matter).