J. Miller, an American jazz arranger active primarily from the 1940s through the 1960s, was a significant, albeit often uncredited, contributor to the big band sound. Known for his sophisticated harmonic voicings and innovative sectional writing, Miller’s arrangements blended swing era exuberance with emerging bebop sensibilities. He frequently collaborated with prominent bandleaders, crafting intricate charts that elevated the performances of countless ensembles. While specific works are often attributed to the bandleaders themselves, Miller’s distinctive touch can be heard in the rich textures and dynamic interplay of many classic recordings, solidifying his legacy as a master of jazz orchestration.