I'm down to help
Would sadder songs that sound uplifting if you listen enough work?
A lot of Ludovico Einaudi's stuff is like that

Something uplifting but relatable to most depressed people

Also here https://open.spotify.com/playlist/3xY1mq7g2ySDpkFKXo12VC?si=3o1Ia1hCSY2cdtLFIGptEQ&pt=70b051c6057df346ac7c49711c8ad62c

Alright I've added a few things
If you think they don't belong I understand if you remove them

I also added a few more too

The last one was more classical but all the others fit great :)

Alright cool
I just put the last one because at least for me it resonates with looking for something good after losing something important

Wow thats deep

But then again that's just from a pianist's view