Heath Ledger's Joker is one of the finest performances put to film.
I can agree that the BATMAN aspects of the Batman film maybe aren't that great, or that the movie takes a downturn in quality when Harvey Dent becomes the focus, but still.... The Joker vs Infinity War is not even a contest. The best of Marvel can't hold a candle to The Joker, and when we talk about drops in quality you really think Quill's jealous jibes at Thor or the side mission with the giant dwarf are gonna hold up over repeated viewings? Shoehorning in the Red Skull? The opening disregarding Ragnarok entirely? The Hulk doing fuck all? Come on.