As the title says....which song still haunts you emotionally? And why? A (freely accessible) link might greatly bring your point across.
Mine would be: (Typhoon - "Empiricist") https://www.youtube.com/watch?v=9E328pIZWFM
The lyrics go deep and it just touches me. No otherwise special attachment.
Sting - The Soul Cages
This album was written when his father died. It's a loose concept album and it devastates from beginning to end but if you haven't heard it before two of the tracks hit hard as standalones:
Island of Souls The Soul Cages
Why Should I Cry For You is both beautiful and pleasant and ruinous