The folk superstar isn’t the flashiest old fogey on a farewell tour right now—that title belongs to either Elton or Ozzy—but Paul Simon’s songwriting remains second to none. Be it solo or with Art Garfunkel, he wrote countless hits that exceeded their eras and became timeless: "The Sound of Silence," “America,” "You Can Call Me Al," "Kodachrome,” etc. Go listen to “Obvious Child” right now. See? Still great.