Complex sentence: His scripts included virtually every movie genre: adventures, musicals, and impassioned romances, but ultimately, he was best known for two specific types of film: crime thrillers and screwball comedies.
Split into simpler sentences: His scripts included virtually every movie genre: adventures, musicals, and impassioned romances. But ultimately, he was best known for two specific types of film: crime thrillers and screwball comedies.