At most I would say maybe The Joker we got briefly in The Batman and it's deleted scene can be criticized that way. But given how little we have to go off there I'm reserving judgment.
The high profile Joker we've gotten most egregious criticized this way in Jared Leto's in Suicide Squad. I've already talked about how Jared Leto's Joker is supposed to be Cringe, and pointed people to both Jack Saint's video on the topic and 16 Attempts to Talk to You about Suicide Squad.
But as far accusing the performance on ripping off Ledger's goes, i really don't see it, he doesn't o that thing his tonge. At most the fact that both sometimes annunciate certain words weirdly could be seen as similar.
The perception that so many post Ledger Jokers are just pale imitations on Ledger's Joker is really just people saying quietly that they're upset the Joker hasn't gone back to being more of the same they usually got before Ledger's Joker.
Caesar Romero's Joker, Jack Nicholson's Joker and Mark Hamil's in Batman The Animated Series, as different form each other as they may seme in execution are each in my view the same basic kind of Joker. For each of them the Clown/Comedy gimmick antics are a means to an end of conventional criminal goals. And The Joker's has been written like that in The Comics sometimes, he was like that in A Death in The Family much to my personal disappointment when I first read it.
And those three were the only particularly mainstream well known popular takes on The Joker known to most non Comic Readers before 2008. The Dark Knight was the first time we got a Joker for whom the Madness was the ends and the conventional criminal activity was the means.
But The Comics had introduced takes on The Joker who didn't have conventional criminal goals at least by the 80s with The Dark Knight Returns and The Killing Joker. These stories were quite philosophically different from each other, Miller and Moore allegedly had an argument about The Joker with Moore saying The Joker is Insane and Miller saying The Joker is Evil.
But even no Comic Readers had gotten a few tastes of this kind of Joker, just off the beaten path of the mainstream. Kerry Shale's performance in the 90s BBC Radio Drama adaptation of Knightfall. Andrew Koenig in the 2003 fan film Batman: Dead End. Even Mark Hamil arguably got his first shot at becoming a better class of criminal in Batman Beyond: Return of The Joker. It is Koenig's performance in particularly that I suspect people would be calling a Ledger;s Joker knock off is came after 2008 rather then before.
The irony is Jared Leto's Joker in terms of what we can see of what he usually does is arguably back to being the regular Criminal with a gimmick take on The Joker that dominated what we got before 2008. But with the added flavor that he's a cringey edgelord who likes to think of himself as something grander then he actually is.
My point is every time people talk about the history of The Joker in a way that implied Ledger's take is the soul source of every remotely "Edgy" Joker to come since, they are demonstrates their ignorance of how "Edgy" The Joker already was.
That includes when some makes a deep philosophical video essays founded on this premise treating the Crigeyness of Leto's Joker as a failure rather then the intention.