This is the list I submitted, it's slightly different from what I posted earlier:
1. Alfred Hitchcock
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2. John Ford
3. Howard Hawks
4. Yasujiro Ozu
5. Michael Powell & Emeric Pressburger
6. Orson Welles
7. FW Murnau
8. Akira Kurosawa
9. Wong Kar-wai
10. Eric Rohmer
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11. Jean-Luc Godard
12. Terrence Malick
13. Josef von Sternberg
14. Jean Renoir
15. Roberto Rossellini
16. Jacques Tati
17. Buster Keaton
18. Hou Hsiao-hsien
19. Nicholas Ray
20. Vincente Minnelli
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21. Charles Chaplin
22. Wes Anderson
23. Samuel Fuller
24. Ernst Lubitsch
25. Alain Resnais
26. Jim Jarmusch
27. Anthony Mann
28. Leo McCarey
29. Raoul Walsh
30. Frank Borzage
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31. Fritz Lang
32. Martin Scorsese
33. Robert Bresson
34. Woody Allen
35. Carl Theodor Dreyer
36. Joel & Ethan Coen
37. Otto Preminger
38. Quentin Tarantino
39. Douglas Sirk
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40. Johnnie To
41. Jacques Demy
42. Stanley Kubrick
43. King Vidor
44. Luis Bunuel
45. Michelangelo Antonioni
46. DW Griffith
47. George Cukor
48. Kryzstof Kieslowski
49. John Woo
50. Michael Curtiz