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.

Out of all the attributes of the gods, the one I find most pitiable is their inability to commit suicide. - De tous les attributs des dieux, celui qui provoque en moi le plus de compassion est leur incapacité au suicide.

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'