If Steve Harris is Iron Maiden’s brain and backbone, then Paul Di’Anno was their raw throat and clenched fists. As they introduced themselves to the world via their self-titled 1980 debut album and the following year’s Killers, they did so under the stewardship of their rough and tumble singer. While Maiden would go on to become the definitive metal band of the ’80s with Bruce Dickinson at the helm, a singer with a foghorn voice capable of matching Steve’s increasingly grand visions, those early works carry with them a ragged charm and threatening directness that came directly from Paul. Insisting that he’d always been a punk singer, though Steve remains adamant that no such element entered Maiden’s orbit, it’s hard not to see where Paul was coming from. As...