Whistler is a great option. I have only been there for spring skiing (April 1 or later). So I have only really skied the alpine areas and nothing at the base. I have heard anecdotes of occasional extreme cold in winter (Jan/Feb), but I have not experienced this first hand. They have a lot of groomed blue terrain. Not as much green.
It is a bit of a hike to get there compared to Utah or Colorado. There are about 3 more hours in the air and additional time in the airport dealing with customs (so about +4 hrs traveling vs. a Colorado destination). Compounded with the time change, your options getting back east are a bit limited. It is worth it, as long as you are skiing at least 3 days. The drive from Vancouver is spectacular. Make sure to do it in daylight for the views.
Utah is a great option if you want to minimize overall travel time. Drive from SLC to Park City area is only about 90 minutes. Deer Valley is a great option for a blue/green skier. It is a bit more expensive vs other resorts in the area, but the resort amenities, trail layout, grooming, and food are top notch. I have had good experiences with the Deer Valley ski school.
Canyons is also good, but has a lot of 'cat tracks'. I have not been impressed with snow quality or trail layout at Park City. I hear Alta and Snowbird are good, but I don't think they have much terrain for blue/green skiers. I have not been to Alta or Snowbird.