Final answer:
Bernard Herrmann is recognized for composing the scores for several Alfred Hitchcock films, standing apart from the classical composers mentioned, by shaping the sound of 20th-century film music.
Step-by-step explanation:
Bernard Herrmann is the composer Alfred Hitchcock chose to write music for several of his films. While composers like Ludwig van Beethoven, Wolfgang Amadeus Mozart, and Johann Sebastian Bach are profoundly influential, their periods were much earlier, and they were not contemporaries of Hitchcock. Herrmann, on the other hand, was known for his ability to create atmospheric scores that greatly enhanced the suspense and emotional impact of Hitchcock’s films, including classics such as 'Psycho,' 'Vertigo,' and 'North by Northwest.' Unlike the composers mentioned in the question, Herrmann's work is not from the Classical or Romantic periods of music but belongs to the realm of 20th-century film scoring. He helped to push the boundaries of film music - similar to how Berlioz, Strauss, and Wagner challenged their audiences with progressive music during their respective times.