The ending of Asobi Asobase. Actually, scratch that, the whole anime is underrated as hell!
The ending of Konosuba S1, both OPs and EDs of Kumodesu, specially the EDs. And that Naruto ending retelling Obito’s life too.
Just off the top of my head.
Oh, and I linked the anime version of all those songs, but you REALLY have to hear all of Kumodesu’s ED1 for the full experience.
Yeah, the second ED is very good too, and even the ED of the Megumin anime was that kind of ED that really grew on me, but, for me at least, the first ED was that kind of ED that just couldn’t be surpassed, like Clannad’s dango ending!
I love how Asobi Asobase flips the “hype OP/calm ED” trope around, and it fits like a glove. Every episode starts calm and normal like the OP, but then it slowly slips further into pure insanity and by the time the episode ends, the ED fits the mood perfectly haha.