The Rock & Roll Hall of Fame‘s entire existence has been leading up to the nomination of an artist like Eminem. Curmudgeonly rock fans may sneer at the very mention of his name, but the Detroit rapper, who was born Marshall Bruce Mathers III, is a textbook Rock Hall candidate. His career got off to an inauspicious start with his 1996 debut album Infinite, which he sold largely out of the trunk of his car to the tune of an estimated 1,000 copies, at most. The failure of Infinite inspired Eminem to create his Slim Shady persona; consequently, it also marked the last time in his life that he wasn…