Update the sixth.
Source lists:
https://web.archive.org/web/20190628021516/https://editorial.rottentomatoes.com/guide/best-animated-series-of-all-time/
https://screenagewasteland.com/the-100-greatest-cartoons-of-all-time-100-91/
https://www.indiewire.com/feature/best-animated-series-all-time-cartoons-anime-tv-1202021835/
https://www.menshealth.com/entertainment/g32380506/best-animated-series/
(Note: I have yet to see an officially published list like this that includes Arcane or Demon Slayer; Hence, their conspicuous absence...)
(Note 2: IndieWire's list seems to be missing the "next" and "previous" buttons, so you'll have to put the page number in the address...)
Enjoy!
