Alan Elliott Alexander Hamilton, who died Jan. 30 at age 77, was a conductor and arranger who was able to add “movie star” to his credits in the last years of his life. His work on Aretha Franklin’s 1972 “Amazing Grace” album — certified as the bestselling album of her career — was heard by millions over a period of almost five decades before Franklin fans actually got to see as well as hear Hamilton’s handiwork as the arranger and conductor of that music.