Hitchcock has a solid case in the "best directors of all time argument." Absurdly he never won a Best Director Oscar and had only one Best Picture win: for Rebecca which I don't think is usually short-listed as among his best films.
The IMDB 250 voters, in their wisdom, have rated his top two movies on the rankings (Rear Window and Psycho) below at least two movies by the following directors: Francis Ford Coppola, Christopher Nolan, George Lucas, Peter Jackson, Steven Spielberg.
But hey, popularity=quality I've heard.