Penny Marshall, Cindy Williams, Michael McKean, and David Lander carved out distinctive careers following the hit sitcom.The cast of ‘Laverne & Shirley’ in 1976Credit: ABC Photo Archives/GettySchlemiel! Schlimazel! Hasenpfeffer Incorporated!From its unforgettable theme song and that iconic “L” embroidered on Laverne’s sweaters to the beloved friendship between two Milwaukee brewery bottle-cappers, the sitcom Laverne & Shirley made an indelible m…