A discontinued Oscar, the Best Original Song Score Oscar would go to a composer who composed multiple songs for a film, most typically given to a musical.
1984:
Prince for PURPLE RAIN
1983:
Alan Bergman, Marilyn Bergman, and Michel Legrand for YENTL
1982:
Leslie Bricusse and Henry Mancini for VICTOR/VICTORIA
1978:
Joe Renzetti for THE BUDDY HOLLY STORY
1970:
The Beatles for LET IT BE