Hmmm.... was that a trick question? Fernie is in the Kootenay's, Kicking Horse is in the Purcells, Red Mountain is in the Monashees, and Whistler is in the coast range. The only two resorts listed, that are in the Canadian Rockies (which is a very narrow range in reality), are Sunshine Village and Marmot Basin/Jasper (so I guess that means Sunshine Village gets the most snow in the Rockies).
And for what it's worth most "non-mountain" people would consider the entire group of mountains west of the Mississippi "The Rockies", though they can be broken down even further into the individual ranges. I remember from grade school, it was The Rockies in the West and the Appalachians in the East.