A perfect song? What are your choices?

the heading is called "ideal song" ... the lifestyle and moral character of this guy left much to be desired, but he apparently felt that this was the end - he gathered his last strength and squeezed out a bestseller (as if atonement) ...
... I regret one thing - 2 cups of cola on the piano got into the video ...

another guy who can be forgiven a lot ... (15-17 years ago I exchanged a couple of phrases with him)

While my guitar gently weeps.    ---      The Beatles  (George Harrison)

Ha! Stephen Colbert asks in his silly Colbert Questionnaire "You can only listen to one song for the rest of your life; what is it?" Ringo Starr immediately said "Come Together;" John Batiste stopped himself after naming 3 or 4. I think perfect songs stand up to listening and interpretation by different artists. There are also songs that are perfect at different times because you are tuned in to the energy of that genre, but that don't stand up to time. I love this kind of post as it opens up my playlists to new great—if not perfect—music. Thanks for all the suggestions everyone! I'll ante up: Love Song by Elton John. I recently heard it by Melody Gardot and have not stopped playing it. 

My Cherie Amour - Stevie Wonder - It's just so damn melodic.

A close second, Thunder Road - Bruce Springsteen - The energy he adds with that pounding piano nearing the end of the song is so powerful.