This. You see glimpses of him, but a lot of the time it's hard to tell. It's a weird mix of both ledger and joker, and it is obviously a very difficult thing to capture in a static expression since no-one has gotten it right. EB has gotten pretty close, but i think their "serious, moody expression" takes something away from it since he is rarely in that mode in the film, might look good on the shelf, but it doesnt really fit any specific scene. HT has had a ton of goes at it and still hasn't got it right, their laughing sculpt looks weird to me especially around the mouth, and the regular one has no ledger in there at all. They sculp to heavy handidly too. I still think their BR sculps are the best of what they've done. especially the slick back hair one. But for now, EB is my prefered sculpt...untill the next ones comes along.
I really do hope somone will sculpt their own 1/4 head, complete with rooted hair. I think at that scale everything would hang and curl way more realistically.
Or better yet, get this guy to print off a 1/4 version of his zbrush sculpt...
https://www.zbrushcentral.com/showthread.php?66303-Heath-Ledger-The-Joker