the very first fluffy stories i read were the eyebright stories (they follow one unlucky mare in a feral herd, has some low supernatural elements)
josef and the awful technicolor smarty herd is practically required reading (probably also the Fall of Cleveland but i havent read it myself yet either)
tbh im still new and havent read nearly as many stories as i want to
additional self plug i’m really proud of the way wumble in the gumgle (i know the name is stupid but gun to my head i could NOT come up with a better one) came out (follows a pitfight between 2 trained shitrats)