I just realized, is Arkham Joker the most evil and backstabbing Joker there is?

I was going through versions of Joker in my head, and I genuinely couldn’t think of a version of Joker that was as evil or even backstabbing as the Arkham one. For example, not all but most Joker’s are normally a silly type of evil, like in a jokingly way, like still evil but have a touch of like silliness to it and non seriousness.

Meanwhile Arkham Joker seems downright evil, literally, no joke or anything, pure dark, and evil. Like sure he’ll still have the happy laughter and smile to him, but he genuinely seems like one of the only versions of Joker that’s like REALLY evil, inherently evil.

And i also say backstabbing, because there are some version of Joker that are willing to work with others, like successfully work with others and not betray, take the Elseworlds Joker from SSKTJL for example, he actually works with his team without trying to kill or betray them. Meanwhile notice how Arkham Joker has never really even worked side by side with someone, Harley sure, but there’s a small hint he doesn’t generally even care about her, he even temporarily betrays her in Asylum when she didn’t make his “party” list.

Another example would be in LEGO Batman 3 the video game, we see Joker working with other villains like Lex Luthor, Firefly, Cheetah, etc. But I actually don’t even picture Arkham Joker doing something like that, like he’s just to backstabbing. Anyway what are you guys thoughts? Is Arkham Joker the most evil version that exists?