I played this game 5 years ago.
The initial spot was McCall, Id. Then I researched all the western mountain towns to make sure. (MT, WY, CO, NM, AZ, ID)
My advice is just to really think through where/how you want to raise your family and what lifestyle you want.
I did, and came to the conclusion that smaller is better (it's a growing community so it's not ever gonna be smaller).
Fast forward and I'll just say it was the best decision we ever made. Fantastic small town community, great schools, great people, complete outdoor paradise. Zero regrets other than we didn't do it sooner.