Ginger Baker, the prodigiously talented and volcanically temperamental rock drummer who helped form Cream, rock-and-roll’s first supergroup, and inspired awe and imitation in a generation of drummers, died on Oct. 6. He was 80. The Associated Press reported Baker’s family saying on Twitter that he died Sunday: “We are very sad to say that Ginger has passed away peacefully in hospital this morning.” Gary Hibbert, a media representative for Baker’s family, confirmed his death, the AP said. Cream, a trio that included guitarist-singer Eric Clapton and bassist-singer Jack Bruce, set a powerful standard for “supergroups,” bands composed of independent star...