Leonard Rosenman

Leonard Rosenman (September 7, 1924 – March 4, 2008) was an American film, television and concert composer with credits in over 130 works, including East of Eden, Rebel without a Cause, Star Trek IV: The Voyage Home, Beneath the Planet of the Apes, Barry Lyndon and the animated The Lord of the Rings.

Description above from the Wikipedia page Leonard Rosenman, licensed under CC-BY-SA, full list of contributors on Wikipedia.