de tous les

listen to the pronunciation of de tous les
الفرنسية - الإنجليزية
of all

Cookie is the cutest of all the dogs. - Cookie est le plus mignon de tous les chiens.

He is the tallest of all boys. - C'est le plus grand de tous les garçons.

Used as an intensifier with nouns to denote being ultimate
Used as an intensifier with superlative forms of adjectives

He was the greatest playwright of all.

See: 'of all people'