Ozzy Osbourne, the original voice of Black Sabbath, died on Tuesday, thus leaving an enormous Ozzy-shaped hole in the world. He is recognized as one of the founding fathers of heavy metal for his decade in Sabbath; went on to have a solo career which, contrary to all expectations, yielded further classics; founded Ozzfest, the lucrative festival/touring series which fertilized a dozen sub-genres of guitar rock; and then, somehow, became a beloved and universally recognized “reality TV” star, mostly by just being a good-natured zillionaire drug casualty tottering around expensive estates and cursing colourfully in front of hand-held cameras.