I have listened to every one of these and moved some into my "sappy song" rotation.
With the last one being the Carpenters, I think really anything by them would qualify. Karen had such a fantastic voice, just amazing. But she had some very large issues, and some of those issues piled on others. I think she felt out of control of anything in her life, that was something she could control, and sadly it killed her. I think today it would be more easy for her to get the help she needed.
As we are on girls I will toss in another with fantastic pipes. And seen to do best with "sappy songs"