I thing Dutch people from my generation have you all beat:

Purno de Purno (porn pun very much intended)

A psychedelic cartoon about a funny guy in spandex that has a shitload of nudity (tits, penisses etc) to the point of him even crawling in the vagina of a giant lady in space. It has references to litaral drug use. Have a look here: https://www.youtube.com/watch?v=4o6MIJ7Iq1U doesn't matter if you know the language, just browse through. That episode is called 'In het hol van de kietelaar' which translates to 'In the clitoris' lair (hole)'

This was on kids tv. Nobody got seriously harmed by it. It was funny and weird, but you don't really register exactltyy how weird it is untill you hear about sensitivities on US TV (nipplegate lol)

Ren & Stimpy

Bible Black.

The oblongs, ripping friends, Ren n Stimpy, I r baboon were some of the best. Drawn together was a gem too that came out when i was a teen

Bible Black and Gantz

Muran Buschstansangur

For me it was probably The Head.

I really liked Duckman as well.

Also, the early Beavis and Butt-Head

True classics, haha.

Duckman, though that was not for kids.

Ren and Stimpy and Rocko's Modern Life both had stuff that was bizarre and only allowed in a kid's show because it was over their heads.

Batman TAS and Gargoyles both had some heavy shit. The latter also had a guy die by having fire erupt from behind his eyeballs, and a scene where a surgeon explains a gunshot wound in visceral detail. God I love that show.

Quads was fucking wild. I remember watching it in between Undergrads and the Oblongs. The wonders of having both parents work night shifts.

Was Attack of the Killer Tomatoes real or did I dream that?

Rocko’s Modern Life was a helluva ride

The original sonic cartoon is like a chili dog induced fever dream

I was a kid in the 90's. It'd probably be easier to list the normalest cartoons. Like Doug.

Freakazoid, possibly. Or Toxic Avenger. Though the latter is more insane that they turned the original concept into something for kids in the first place.

The Last Unicorn. Runner up, The Rats of Nymn.

The crazy stuff on Liquid Television

I'm still not sure whether "Angela Anaconda" was real or a collective fever dream.

cow and chicken

Watership Down.

Was visiting relatives and we rented movies from a tiny video store that didn't have a lot of options or kids, so we got that and Crocodile Dundee.

Dundee was fun. The bunnies were less so.

Do Saturday Night Live skits count?

The Ambiguously Gay Duo

Ren and Stimpy

Beavis and Butthead

Oh, man, when I was a kid around 1990 I was in France (maybe? Pretty sure it was somewhere in Europe), and they had this subtitled cartoon (I didn't know either language) that "starred" a villain named something like Amin Tumani ("I'm in to money", but made into a name) that was a stereotypical middle easterner. And to add to the crazy I'm 99.9% sure he died at the end of every episode.

If anyone knows anything about this cartoon, LMK.

The first one that comes to mind is this one from probably the early 90s. From what I remember it was a group of kids and one of them is sick or something and the other kids try to save him? In the end they each sacrifice a year of their life so that the sick friend can live. I wanna say Steven Spielberg was a producer.

There was also that one crossover movie where a bunch of cartoon characters from whatever was popular in the 80s did an anti-drug movie.