I've been in all the places you mention, plus lots of other places in the world. Personally I would say that Glacier (and Waterton) are the most stunningly beautiful places I've seen. I was there in 1984 and am still amazed.
"At times the world can seem an unfriendly and sinister place, but believe us when we say there is much more good in it than bad. All you have to do is look hard enough, and what might seem to be a series of unfortunate events, may in fact be the first steps of a journey." Violet Baudelaire.