I’m going to second Za’s suggestion about Strudel Lives Forever, @AmbitiousLeather8309 . It’s a wonderfully touching bit of sadbox that definitely brings the feels and one i think would mesh wonderfully with your style.
Mummah, Wai? By @Maple is something I’ve always wanted to see illustrated. It’s very bleak and sad without being overly complicated or having a lot of moving parts. It’s likely one of my favorite stories on the site.
If you want something more light-hearted, feel free to illustrate any of mine! Any story that catches your fancy would be fine, but if you want something more specific: Amey’s Favorite Color is a silly hugbox-type story that would work well as a narrated comic, so easy to adapt. Bright Night Light is light-hearted accidental abuse about a bat fluffy fighting to turn off his night light so he can sleep, for when you want something less hugboxy that isn’t true abuse.