The three dozen songs sorry having trouble reading OP due to tears!
So many.
'The Day Thou Gavest'
'Jerusalem'/'Land of Hope & Glory'
'London Pride' Noel Coward
'There is Nothing New to Tell You' Joyce Grenfell
'Mamma, Look Sharp' from an American musical called '1776' - a dying soldier is calling out to his mother to come and find him; it's almost unbearable. I honestly can't listen to it. If anyone looks it up, don't say I didn't warn you!
'Crazy World' from the film 'Victor/Victoria'
Anything sung by Welshmen, esp. The Black Mountain Choir. 17 years ago when Mum was in a coma I'd play their tape & every time her blood pressure, oxygen, etc. got better. In her last few months that tape and
'Green Green Grass of Home' Tom Jones were all she wanted to listen to. She'd whisper the 'Amens' of the Choir songs even when she could barely speak or breathe.
Have a good laugh about this one everybody, I won't be offended: no one can make me blub quite like Dame Hilda Bracket! She had a way with the old lovelies like 'Keep the Home Fires Burning,' 'If Only You Had Cared for Me,' etc. that just gets to me ridiculously. The 'Vilja Song' from 'The Merry Widow' as performed by the Dame and STOATS - the Stackton Trestle Operatic Amateur Traumatic Society (memory might not be perfect on that!) is my favourite version of an already favourite, turns-it-on-at-the-mains song.
More classical things than I could list, definitely 'Pearl Fishers' duet, Delius 'Summer Evening,' there's a Grieg folk dance whose name I can't remember but will have a look round for, roughly a hundred others. Madrigals often get me weepy - not so much from sadness as just beauty. But then that's true of lots of emotion.
Nelliemoser the version of 'Ave Verum' you linked is astonishing! Your description alone almost made me cry, it's so perfect. Thank you so much.
Eleo, lovely to know I'm not alone in my feeling about Richard Harris's music. Think he's sadly under-rated. 'MacArthur Park' & 'This Time We Almost Made It' are really remarkable.
Adam Ant's 'Wonderful' is so under-rated it's criminal. Not many pop songs really move me but I think both the song & the video express so much of what it feels like when you've hurt someone you love. Will try to link video, & Hinge & Bracket's 'Vilja' - it's at the end of a compilation, starts at abt. 9:45 or so.
Really hope I can do this www.youtube.com/watch?v=HLVlOyFmNIo