Complex sentence: Though Kenton's taste would evolve and Holman was not functioning as Chief Arranger by the end of the 1950s, he continued to make key contributions to the Kenton repertoire all the way to 1977 before Kenton's demise in 1979.
Split into simpler sentences: Though Kenton's taste would evolve and Holman was not functioning as Chief Arranger by the end of the 1950s. Bill Holman continued to make key contributions to the Kenton repertoire all the way to 1977 before Kenton demise in 1979.