The modern movie that is often praised for having one of the best soundtracks is "Guardians of the Galaxy" (2014). The soundtrack features a compilation of popular songs from the 70s and 80s, creating a nostalgic and lively atmosphere throughout the film. The music enhances the film by setting the tone for key scenes, providing emotional depth to character moments, and adding a layer of fun and excitement to the overall viewing experience. The music is so well integrated into the storyline that it almost becomes a character in the film itself, making it a standout element that greatly enhances the movie.