Another vote for Rain Song, Tangerine, and Thats the Way, and you could also include Going to California, and forget basic responses (groans etc, very predictable) but Stairway to Heaven(up until the solo) is definatly in the realms of pretty (not that i dont like the solo, just by then its moving away from ‘pretty’).
I would also add ‘The Blowers Daughter’ by Damien Rice particularly when the piano joins in near the end, just perfect.
Sugar Mountain by Neil Young is also incredibly pretty.
Actually I tend to give most of these songs a perfect 10. None of them actually qualitatively better then any other, I just chose 2 of my favorites. But I can’t believe I forgot this one that I absolutely love. Written by Woody Guthrie, played by Wilco. It’s called “California Stars.” Ooh yeah.