These are all really spectacular images. That said, in answer to your question, if you can only choose two, my picks would be the first and the 4th. The 5th is also a real eye catcher, however the mountain peaking through the trees is a bit too centered for my tastes, and while I love the composition on the 2nd & 3rd images, they are more subtle.
Just my two cents worth. I'll go delete all of my own Teton photos in despair now.
= Ed =