Looking for some gut-wrenchingly sad books

I read almost exclusively fantasy, but I like to take a break between massive slogs like Stormlight Archive and Wheel of Time with some general fiction and over time I've come to realize I'm most drawn to tales of sadness, things that make me feel, or stuff that makes me want to cry. Some examples of past stuff I have read and absolutely LOOOOOVE:

• 10 Minutes 38 Seconds in This Strange World by Elif Shafak – Easily my favorite on this list. Years later and I still think of this book. I loved the interchanging narrative, the actual prose, the passages that ripped my heart out, but also the glimmers of warmth and hope with Leila's friends. I also loved the setting. I place it in my 'Standout Standalone' category.
• The Book Thief by Markus Zusak – Of course this one had to make the list. I actually did sob hard reading it. Such a beautiful book.
• The Tattooist of Auschwitz by Heather Morris – Ok ok, I know this book is highly divisive and there's controversies with the historical inaccuracies, but reading is a subjective thing and just from a story perspective, I did really enjoy this novel.
• Reading Lolita in Tehran: A Memoir in Books by Azar Nafisi – It's been many many years since I've read this, but again I liked the narrative structure as well as the subject matter.
• Shark Heart by Emily Habeck – I honestly read this on a lark after seeing a TikTok video about it and I cried, it was so so beautiful. I even hassled my partner to start it the very next day, which he did and ALSO loved it. Just a beautiful tragic story. But one of love and hope.
• The Brief Wondrous Life of Oscar Wao by Junot Díaz – My copy of this novel is rife with annotations and pull tabs marking passages, highlighted sections and so much wear and tear. I loved everything about this novel.
• The Plague Dogs by Richard Adams – Really only listed because I don't see enough love for this book and it broke my little heart.

I could have listed a lot of other Holocaust fiction but I didn't want to overwhelm the list with just those ones in particular so I tried to show a decent spread of things I like. I'm not necessarily looking for insanely high-brow literature like something by David Foster Wallace or Murakami. I read these to take a breather from dense fantasy sagas so I don't want something that's equally lofty and dense and requires me to whip out my thesaurus.

Subject matters I would prefer to avid: rape, animal abuse. They are things that can be featured (as both items appear in at least 4 of my listed novels) but I don't want that to be the primary subject matter.

Thank you for any and all recommendations!