This is an older list, but as a screenwriter I still think it's interesting to look at.
Here's the list from the
WGA, in order with proper credits given for each film.
And here's what I've broken it down to:
1934 #59 It Happened One Night
1937 #85 La Grande Illusion
1939 #23 Gone with the Wind
#25 The Wizard of Oz
1940 #31 His Girl Friday
#37 The Philadelphia Story
#98 The Grapes of Wrath
1941 #4 Citizen Kane
#29 Sullivan's Travels
#47 The Maltese Falcon
#52 The Lady Eve
1942 #1 Casablanca
1944 #26 Double Indemnity
1946 #20 It's a Wonderful Life
#44 The Best Years of Our Lives
#101 Notorious
1948 #46 The Treasure of the Sierra Madre
1949 #33 The Third Man
1950 #5 All About Eve
#7 Sunset Blvd.
1951 #70 The African Queen
1952 #65 Singin' in the Rain
#75 High Noon
1954 #18 On the Waterfront
#83 Rear Window
1956 #97 The Searchers
1957 #34 The Sweet Smell of Success
#48 The Bridge on the River Kwai
1959 #9 Some Like it Hot
#21 North by Northwest
1960 #15 The Apartment
#92 Psycho
1961 #96 The Hustler
1962 #14 Lawrence of Arabia
#19 To Kill a Mockingbird
1963 #87 8 1/2
1964 #12 Dr. Strangelove
1967 #13 The Graduate
#82 Cool Hand Luke
1968 #71 The Lion in Winter
#79 The Producers
1969 #11 Butch Cassidy and the Sundance Kid
#36 Midnight Cowboy
#99 The Wild Bunch
1970 #94 Patton
1971 #86 Harold & Maude
1972 #2 The Godfather
1973 #39 The Sting
1974 #3 Chinatown
#10 The Godfather, Part II
1975 #45 One Flew Over the Cuckoo's Nest
#63 Jaws
#69 Dog Day Afternoon
1976 #8 Network
#43 Taxi Driver
#53 All the President's Men
#78 Rocky
1977 #6 Annie Hall
#68 Star Wars
1979 #54 Manhattan
#81 Being There
#55 Apocalypse Now
1980 #58 Ordinary People
#76 Raging Bull
1981 #42 Raiders of the Lost Ark
1982 #17 Tootsie
#67 E.T. the Extra-Terrestrial
#91 The Verdict
1983 #64 Terms of Endearment
1984 #73 Amadeus
1985 #56 Back to the Future
#80 Witness
1986 #95 Hannah and Her Sisters
1987 #51 Broadcast News
#62 Moonstruck
#84 The Princess Bride
1989 #40 When Harry Met Sally...
#57 Crimes and Misdemeanors
#88 Field of Dreams
#93 Do the Right Thing
1990 #41 GoodFellas
1991 #61 The Silence of the Lambs
#72 Thelma & Louise
1992 #30 Unforgiven
1993 #27 Groundhog Day
#49 Schindler's List
1994 #16 Pulp Fiction
#22 The Shawshank Redemption
#89 Forrest Gump
1995 #35 The Usual Suspects
1996 #32 Fargo
#66 Jerry Maquire
1997 #60 L.A. Confidential
1998 #28 Shakespeare in Love
1999 #38 American Beauty
#50 The Sixth Sense
#74 Being John Malkovich
2001 #100 Memento
2002 #77 Adaptation
2004 #24 Eternal Sunshine of the Spotless Mind
#90 Sideways
4 films – 1941, 1976, 1989
3 films– 1940, 1946, 1969, 1975, 1979, 1982, 1987, 1994, 1999
2 films– 1939, 1950, 1952, 1954, 1957, 1959, 1960, 1962, 1967, 1968, 1974, 1977, 1980, 1985, 1991, 1993, 1996, 2004
4 films -- Woody Allen (6, 54, 57, 95)
Francis Ford Coppola (2, 10, 55, 94)
Billy Wilder (7, 9, 15, 26)
3 films -- William Goldman (11, 53, 84)
Charlie Kaufman (24, 74, 77)
John Huston (46, 47, 70)
2 films -- Mario Puzo (2, 10) -- co-written with Francis Ford Coppola
I.A.L. Diamond (9, 15) -- co-written with Billy Wilder
Ernest Lehman (21, 34)
Michael Wilson (14, 48)
Preston Sturges (29, 52)
James L. Brooks (51, 64)
Carl Foreman (48, 75)
Paul Schrader (43, 76)
Frank Pierson (69, 82)
Surprises --
The Wild Bunch, Patton, Rocky, Star Wars, Jaws, The Wizard of Oz, 8 1/2, La Grand Illusion, Dr. Strangelove so high
Snubs --
A Place in the Sun,
The Remains of the Day, The Truman Show, Young Frankenstein, and too many others to name
I'll take another day or two with this list and offer a more in-depth look then.