Ray Charles ( born Charles Raymond Offenberg ; September 13 , 1918 -- April 6 , 2015 ) , was an American musician , singer , songwriter , vocal arranger and conductor who was best known as organizer and leader of the Ray Charles Singers .
Charles Raymond Offenberg ( September 13 , 1918 -- April 6 , 2015 ) , better known as Ray Charles , was an American singer , songwriter , musician , conductor , and vocal arranger .