Anthony Tommasini says that Luciano Pavarotti will be remembered not only for helping to turn opera into a stadium concert event, but for a voice so unmistakable, so effortless that no one could ever mistake it. “For intelligence, discipline, breadth of repertory, musicianship, interpretive depth and virile vocalism, Mr. Pavarotti was outclassed by his Three Tenors sidekick and chief rival, Plácido Domingo. But for sheer Italianate tenorial beauty, Mr. Pavarotti was hard to top.”