AOT ending was pretty dogshit, no real saving grace.
Oshi No Ko Ending is overhated and was pretty decent, though it certainly could've been better.
Psyren's ending was somewhat mid, but it also was axed, so understandable
Im-Dal Young doesn't have any endings, since that fucker keeps putting all his stories on permanent hiatus and people keep falling for it.
Mikazumi Satoshi is pretty good at ending his stories, generally, a goated author
The Heroine has despaired also had a pretty satisfying ending with
that guy getting shanked and dying alone in an alleyway, still not even comprehending what he did wrong
Medaka Box? Hyouge Mono? A beast Cries in the Wilderness? Helck? Stealth Symphony? Jitsu wa Watashi Wa? Fantastic endings
Isekai Walking's Chapter 30 ending of
The protagonist's adventure ending early after perishing in combat was quite daring and made the story a quite nice and short tragedy. There weren't any chapters after that that would make the story rot.