Good grimdark stories

[rwbryan 16]

I've been watching MLP with a friend and I wanted to know if there's any grimdarks that don't have anything after Season 5, episode 11. "A Steep Learning Curve" by ObabScribbler/ScribblerProductions being an example with Starlight being the main focus. I was thinking of maybe showing them the classics like Rainbow Factory or Cupcakes but I don't want anything to be spoiled. Any suggestions that won't spoil anything like the CMC'S cutie marks, have future villains, or need to be in the community enough to understand jokes would be greatly appreciated.

I don't really know if I can share links though. If we can, I will add it later or put it in the comments