The worst movie directed by Alfred Hitchcock was “Juno & the Paycock” (1930) since most of it takes place within a single setting plus the story’s pacing is slow as fuck (not until the end that the plot evolves). The best one he directed for me personally is “Strangers on a train” (1951) since the acting is good & engaging plotline. Other ones that are also good are: The Birds, Vertigo, Psycho, North by Northwest to name a few.
Rear Window, partly because he takes the ‘shot in the same location’ idea and makes the best possible movie out of it. Partly because he shines a fascinating camera on the phenomenon of people-watching. But also because the specially-built set (inside a warehouse stage IIRC) is incredibly intricate and becomes the 3rd star of the movie, effectively. All that said, viscerally I just loved it, as well.
Meanwhile, I caught a couple of Hitch’s movies later in his life and they didn’t do much for me. So, somewhere in that 4-film run of Marnie to Family Plot would be my least favorite.