As the lead singer of Black Sabbath, he helped invent heavy metal. On “The Osbournes,” he presented a comedic counterpoint to his rock ’n’ roll infamy.

The rocker helped define the sound, look and attitude of metal. But his persistence through addiction, his connection to audience and a late-career reality TV show endeared him to…

He pioneered heavy metal, became an unlikely reality TV star and performed a colossal final concert two weeks before his death.