Every skier should visit Alta at least once. Don't let the reputation intimidate you - there's terrain for all abilities as Alta.
Snowbasin would be my next rec. It's not that far from PC and is generally a lot less crowded.
Deer Valley is pretty much the same schtick as PC/Crayons. Easy to get to, but probably not worth the expense since you've already paid for your Epic pass.
Sundance is a nice boutique resort, but it's small and a long drive. I'd say only go if you really have a strong desire to ski it.
BCC resorts (Brighton, Solitude) are nice too, but if I were in your place I'd do a day at Alta, a day at Snowbasin and spend the rest of the trip at PC/Crayons.