Danger Mouse - I think the consistent 4th wall breaking, kidnapping narrators, and sense of humour as a whole had an effect on my from a formative age.
Monkey Dust - the cartoon that made it clear to me that cartoons weren’t not at all nesseccarily safe for kids. I was too young to appreciate it at the time, it was too disturbing for tween me.
Sealab 2021 and Excel Saga both crazy animations that I found easier to digest about that time, too.
Watership Down, other folks have already mentioned.
[Map Men / Jay Foreman] (https://m.youtube.com/channel/UCbbQalJ4OaC0oQ0AqRaOJ9g) - fun, painstakingly produced educational videos about maps.
Yhara Zayd - Not too long media analysis. Especially of Horror and through BPoC lens.
Andrewism - discussions about Anarchism and organising from Trinidad.