The selection of "most epic, sweeping, soundtrack-style music" is subjective and varies from person to person. However, one piece of music that is frequently cited as fitting this description is "Also sprach Zarathustra" by German composer Richard Strauss.
"Also sprach Zarathustra" was composed in 1896 and is considered a tone poem. It is based on the philosophical novel of the same name by Friedrich Nietzsche and is known for its sweeping and grandiose musical themes. The piece is comprised of nine sections, each of which is meant to convey a different philosophical idea or emotion.
The music of "Also sprach Zarathustra" has been used in numerous films and television shows, most notably in Stanley Kubrick's "2001: A Space Odyssey." The use of the music in this film helped to popularize the piece and cement its place as a iconic example of epic, sweeping, soundtrack-style music.
The music of "Also sprach Zarathustra" is characterized by its sweeping and grandiose musical themes. The opening section, "Sunrise," is perhaps the most well-known and is recognized for its dramatic and triumphant brass fanfare. This fanfare sets the tone for the rest of the piece and is an excellent example of the grandiose and epic musical style that Strauss was known for.
In conclusion, "Also sprach Zarathustra" by Richard Strauss is a prime example of epic, sweeping, soundtrack-style music. Its use in films and television has helped to popularize the piece and its grandiose musical themes have made it a staple of the classical repertoire. This tone poem is a testament to Strauss's musical prowess and his ability to convey complex philosophical ideas through music.