Is Saquon Barkley in a tier of his own?

Show 4/15/18: "Is Saquon Barkley in his own tier when compared to this 2018 NFL Draft Class? Will one of Nick Chubb, Sony Michel, Courtland Sutton, Christian Kirk, Royce Freeman, Derrius Guice, Josh Allen, or other, rise up and be even near as good? Find out!