RC, a pivotal figure in mid-20th century American jazz arranging, was renowned for his sophisticated and innovative contributions to big band and orchestral jazz. His distinctive style blended intricate harmonic voicings with a swinging rhythmic sensibility, elevating the sound of numerous ensembles. RC's notable collaborations included arrangements for the Duke Ellington Orchestra and Count Basie Orchestra, where his work on pieces like "Midnight Serenade" and "Harlem Nocturne" became iconic. His meticulous scores and imaginative orchestrations significantly expanded the sonic possibilities of jazz ensembles, influencing generations of arrangers and solidifying his legacy as a master of the craft.