Search found 1 match: Orson Welles

Interesting. I used a slightly different method, grouping by decade and eliminating any unique director names from each group (thus a 2-film minimum):

2010s: Too few rankings to be meaningful

2000s:
Coens (2) 90
Ang Lee (2) 84
Bela Tarr (2) 82
Adam Curtis (3) 78
Katsuhito Ishii (3) 76

1990s:
Coens (4) 83
Tarantino (2) 74
Fincher (2) 69
Nick Park (2) 69
Jarmusch (2) 65

1980s:
Kubrick (2) 86
Abrahams / Zucker (2) 77
Hayao Miyazaki (3) 74
Sam Raimi (2) 69
Jonathan Demme (2) 65

1970s:
Kubrick (2) 82
Coppola (4) 80
Tarkovsky (3) 79
Peter Watkins (2) 79
Bergman (2) 79

1960s:
Kaneto Shindo (2) 90
Masaki Kobayashi (5) 85 (83 if Human Condition is counted as one movie)
Fellini (2) 85
Ozu (3) 84
Bergman (2) 81

1950s:
Kubrick (2) 91
Ozu (4) 90
Satyajit Ray (3) 78
Kurosawa (5) 75
Mizoguchi (5) 75

1940s:
John Ford (2) 77
Orson Welles (2) 76
John Huston (2) 75
Ozu (2) 75
Howard Hawks (2) 74

1930s:
Chaplin (2) 77
Jean Renoir (3) 67
Leo McCarey (2) 66
Ernst Lubitsch (2) 59
Jean Vigo (3) 53

1920s & earlier: too few rankings

The Coens and Bergman are top-5 in two decades; Ozu and Kubrick are top-5 in three decades. American directors nearly drop out during the 50s and 60s.