These are not quite pre-70s, but... Ernest Lubitsch's The Merry Widow (1934) Orson Welles' The Magnificent Ambersons (1942) Antonioni's Blow-up (1966) and Zabriskie Point (1970) Nicholas Roeg's Performance (1970) Ken Russel's The Devils (1971) Terrence Malick's Badlands...