I don't understand why some reviewers call "Criminal Life of Archibaldo De La Cruz" (1955) - "minor" Bunuel. The only "minor" about this (and many his films) is its running time, only 89 minutes but all his films are enigmatic, odd, charming, and always brilliant. I consider Bunuel one of the best and original filmmakers ever and nothing he had done is minor for me.
"Criminal Life of Archibaldo De La Cruz is B/W comedy of Don Luis' Mexican period which is surreal, disturbing, erotic and funny satire about a perverted young and wealthy man, an amateur sculptor. Since he was a boy, and one evening witnessed the sudden death of his young attractive governess and became sexually aroused by it, Archibaldo De La Cruz dreams of committing a perfect crime of an attractive woman to recreate the feeling but something always prevents him from fulfilling his dreams. It does not mean that the deaths would not occur -it is just that Archibaldo can't take a credit for them.
"El" (1953) aka "This Strange Passion" is more disturbing than funny portrait of an aristocrat, Arturo de Cordova, attractive, rich, religious middle-aged man who goes completely insane because of his pathological jealousy. What he decided to do to his young wife to punish her for the acts of infidelity that she had committed strictly in his mind, is very scary. Of course, it is Bunuel and the film has as much drama as his typical irony and dark humor but it is very dark. This is nothing light about obsessions - jealousy is an incurable and insatiable monster.