Here it is. Rather splendid
[video]https://www.youtube.com/watch?v=n71AcblniVU[/video]

Best existential rock ballad?

Hmm, best I can think of off-hand:

Sinead O’ Connor – Nothing Compares 2 U

Joe Cocker – A Little Help From My Friends

Pulp – This is Hardcore

All just stonkingly awesome – but the very Greatest, the one that ripped me up from the ground up and still puts a lump in my throat since first hearing it 33 years ago is this one:

[video]http://youtu.be/_ZiN_NqT-Us[/video]

(Even the show’s security guard has glass-eye and a jaw wide open)