HOF right now? No.
But name a better QB in the first 5 years of his career. (Just don't mention Tom Brady's name because I don't like discussing him.)
He doesn't have the stats (he did set the Steelers TD record last year) but I think he doesn't have the stats because he doesn't play "normal football".
But lets break down his first 5 years:
Year 1: 15-1 record for the Steelers. UNDEFEATED record by Roethlisberger. The loss was by Maddox.
Year 2: Superbowl win. Even if you have a problem with how the game was reffed, he still fucking got there.
Year 3: Freak motorcycle accident. Didn't die. You all would have.
Year 4: Sets Steelers TD record.
Year 5: Won another Superbowl. Hardest schedule in the history of football.
51 wins, 2 Superbowls. Name your favorite quarterback. He didn't do that.
Granted, the defense makes his job a shitload easier. But nobody scrambles like him on a broken down play. And his win-loss record against NFC teams, Ohio teams, etc. is pretty nuts. He doesn't put up stats, he wins games, period. Plus, give him some credit playing behind that O-line.