The nomination of "Our Town" by @waltersalas is a great one. I’ll add her devastating song "No Time To Cry" (also done by Merle Haggard). Then there is Brian Wilson’s "God Only Knows", as good as songwriting gets, with wonderful singing by his brother Carl. Another is "The Weight" by The Band, and "What Becomes Of The Brokenhearted", sung by Jimmy Ruffin (Joan Osborne also recorded great versions of the song, both live and in the studio)..