Not RnR, I believe, but Roberta Flack's "First Time, Ever I Saw Your Face," is one of the few pop melodies that I store with my Classical titles.
The Most Beautiful Song of The RnR era?
I'm about to spend a week with my father in law, who loves music but insists that nothing of interest (that is, beautiful) has been produced since WWII. In order to get a little music in, I thought I'd burn a compilation cd that might not offend his sensibilities too deeply. "God Only Knows", "Hello, It's Me", "Truly, Madly, Deeply", "Something", and "Bee's Wing" are in. Many others are under conssideration. Your additional suggestions would be appreciated.