In my experience,

"A man who hates his life to the point of suicide is shown by a guardian angel how much the other people around him depend on him. As a result of seeing what the world would be like without him, he changes his mind about the suicide and ends up embracing the life he has, recognizing the simple yet wonderful things about it for what they are."

is not a conventional Hollywood story. Do you have any other examples? I'm mostly interested not because I want to prove you wrong, but because I actually want to be wrong and I want to watch these movies if they exist. Groundhog Day is the only other one that comes to mind.