Actor, comedian, and writer Garry Shandling was the mastermind behind “The Larry Sanders Show” (HBO 1992-98) and “It’s Garry Shandling’s Show” (Showtime, 1986-90) –groundbreaking, critically-acclaimed cable comedies that parodied the conventions and culture of television. In both series, art imitated life, with the actor portraying an insecure, self-obsessed loser in love who was the butt of his own jokes. Off-screen, his persona was much the same, whether he was performing stand-up or hosting “The Tonight Show.” Shandling made several feature film appearances following the wrap of “Sanders”