The movies on this list are ranked according to their success (awards & nominations), their popularity, and their cinematic greatness from a directing/writing perspective.

The list

1. The Godfather (1972)
2. The Shawshank Redemption (1994)
3. Schindler's List (1993)
4. Raging Bull (1980)
5. Casablanca (1942)
6. Citizen Kane (1941)
7. Gone with the wind (1939)
8. The Wizard of Oz (1939)
9. One flew over the cuckoo's nest (1975)
10. Lawrence of Arabia (1962)
11. Vertigo (1958)
12. Psycho (1960)
13. The Godfather: Part II (1974)
14. On the waterfront (1954)
15. Sunset Blvd. (1950)
16. Forrest Gump (1994)
17. The Sound of Music (1965)
18. 12 Angry Men (1957)
19. West Side Story (1961)
20. Star Wars: Episode IV - A New Hope (1977)
21. 2001: A Space Odyssey (1968)
22. E.T. the Extra-Terrestrial (1982)
23. The Silence of the lambs (1991)
24. Chinatown (1974)
25. The bridge on the river kwai (1957)
26. Singin' in the rain (1952)
27. It's a wonderful life (1946)
28. Dr. Strangelove or: How I learned to stop worrying and love the bomb (1964)
29. Some like it hot (1959)
30. Ben Hur (1959)
31. Apocalypse Now (1979)
32. Amadeus (1984)
33. The Lord of the Rings: The return of the king (2003)
34. Gladiator (2000)
35. Titanic (1997)
36. From here to eternity (1953)
37. Saving Private Ryan (1998)
38. Unforgiven (1992)
39. Indiana Jones and the Raiders of the lost Ark (1981)
40. Rocky (1976)
41. A streetcar named Desire (1951)
42. De Philadelphia story (1940)
43. To kill a mockingbird (1962)
44. An American in Paris (1951)
45. The best years of our lives (1946)
46. My fair lady (1964)
47. A Clockwork Orange (1971)
48. Doctor Zhivago (1965)
49. The Searchers (1956)
50. Jaws (1975)
51. Patton (1970)
52. Butch Cassidy and the sundance kid (1969)
53. The treasure of the Sierra madre (1948)
54. Il buono, il brutto, il cattivo (1966)
55. The Apartment (1960)
56. Platoon (1986)
57. High noon (1952)
58. Braveheart (1995)
59. Dances with wolves (1990)
60. Jurassic Park (1993)
61. The Exorcist (1973)
62. The Pianist (2002)
63. Goodfellas (1990)
64. The Deer Hunter (1978)
65. All quiet on the western front (1930)
66. Bonnie and Clyde (1967)
67. The French Connection (1971)
68. City Lights (1931)
69. It happend one night (1934)
70. A place in the sun (1951)
71. Midnight Cowboy (1969)
72. Mr. Smith goes to Washington (1936)
73. Rain Man (1988)
74. Annie Hall (1977)
75. Fargo (1996)
76. Giant (1956)
77. Shane (1953)
78. The Grapes of Wrath (1940)
79. The Green Mile (1999)
80. Close Encounters of the Third Kind (1977)
81. Nashville (1975)
82. Network (1976)
83. The Graduate (1967)
84. American Graffiti (1973)
85. Pulp Fiction (1994)
86. Terms of Endearment (1983)
87. Good Will Hunting (1997)
88. The African Queen (1951)
89. Stagecoach (1939)
90. Mutiny on the bounty (1935)
91. The Great Dictator (1940)
92. Double Indemnity (1944)
93. The Maltese Falcon (1941)
94. Wuthering Heights (1939)
95. Taxi Driver (1976)
96. Rear Window (1954)
97. The Third Man (1949)
98. Rebel without a cause (1955)
99. North by Northwest (1959)
100. Yankee Doodle Dandy (1942)

My opinion:

Personally I do think that there are lot more movies that could fit these places, but nobody's opinion is the same and I like to respect that. I find it great that so many people can share one common love for something (this case movies) and still have different ideas or choises. 

This is what makes it so great! If you don't really agree with the list or want to add some more movies of your own, feel free to leave a comment below! 

I hoped you liked this list and enjoy your day! 

Greetings

Xander F.

source: http://www.imdb.com/list/ls055592025/