In the first early years of the Academy, the Original Score Oscar was split into two, first just to honor musicals, since musicals were so popular in the 1930s and 1940s. It was then discontinued for several years until the Disney resurgence of the late 1980s and early 1990s, when they were winning the Original Score Oscar all the time. That separate Oscar would only last for four years though, before they became one Oscar again to the present day.
1998:
Stephen Warbeck for SHAKESPEARE IN LOVE
1997:
Anne Dudley for THE FULL MONTY
1996:
Rachel Portman for EMMA
1995:
Alan Menken and Stephen Schwartz for POCAHONTAS
1961:
Saul Chaplin, Johnny Green, Irwin Kostal, and Sid Ramin for WEST SIDE STORY
1960:
Morris Stoloff and Harry Sukman for SONG WITHOUT END (THE STORY OF FRANZ LISZT)
1959:
Ken Darby and Andre Previn for PORGY AND BESS
1958:
Andre Previn for GIGI
1956:
Ken Darby and Alfred Newman for THE KING AND I
1955:
Robert Russell Bennett, Jay Blackton, and Adolph Deutsch for OKLAHOMA!
1954:
Saul Chaplin and Adolph Deutsch for SEVEN BRIDES FOR SEVEN BROTHERS
1953:
Alfred Newman for CALL ME MADAM
1952:
Alfred Newman for WITH A SONG IN MY HEART
1951:
Saul Chaplin and Johnny Green for AN AMERICAN IN PARIS
1950:
Adolph Deutsch and Roger Edens for ANNIE GET YOUR GUN
1949:
Roger Edens and Lennie Hayton for ON THE TOWN
1948:
Roger Edens and Johnny Green for EASTER PARADE
1947:
Alfred Newman for MOTHER WORE TIGHTS
1946:
Morris Stoloff for THE JOLSON STORY
1945:
Georgie Stoll for ANCHORS AWEIGH
1944:
Carmen Dragon and Morris Stoloff for COVER GIRL
1943:
Ray Heindorf for THIS IS THE ARMY
1942:
Ray Heindorf and Heinz Roemheld for YANKEE DOODLE DANDY
1941:
Frank Churchill and Oliver Wallace for DUMBO