Hmm, I sort of agree about Ledger. I rewatch Inception, Interstellar, and The Prestige regularly though. The IMAX shots in Interstellar are amazing in 4k HDR and I do enjoy the plot for the other two.
His movies doesn’t suck. He’s an excellent technician and movie-mechanic, but his apparent inability to portray humans and their connections in a believable manner puts him in the overrated-book for me.