Luther Vandross is rightly celebrated as a master R&B balladeer, thanks to romantic dramas such as “Wait for Love”. Yet he could also riff jazzily in a synth-funk track like “‘Til My Baby Comes Home” or a bright new jack swing number like “The Best Things in Life Are Free”, his duet with Janet Jackson. And his finely detailed heartbreak turned “Please Come Home for Christmas” into a seasonal classic.