It’s a pain to add links while on my phone but:
The Biggest Litterbox, by RQ (already mentioned)
Honest Tyrone’s Happy Fluffy Organic Farm, by Gardel
Fat Shaming, by PeppermintParchment
Just Trying to Make it, by Swindle
Kerry’s Story, by differential_Sloth
Smarty Goes Into Advertising, by FractalFluff
Jelly and Snowflake, by Hornlarry
The Four Candles of Christmas, by Wangew_Wick
Also stuff by Feyascia, but that has not been reuploaded.
All of the authors above have written many good stories, and I’m not sure I picked the very best from either of them. But I picked stories I remember and that had an impact on me.