Jean Epstein's early work was obviously an influence on Buñuel, but Epstein went on to become a short-format documentarian, whereas Buñuel (a Spanish surrealist, not an French impressionist) went on to greatness, for well over 20 years after Epstein was dead.
_________________________
"The trouble with being a ghost writer or artist is that you must remain anonymous without credit.
If one wants the credit, one has to cease being a ghost and become a leader or innovator." — Bob Kane