The Baltimore Ravens villain was always going to be a Pittsburgh Steeler. That’s the way of the world. The Ravens biggest rival is the Steelers, and not even the Patriots are big enough rivals to truly debate that. Ben Roethlisberger was an easy choice for the Ravens biggest foe.
One reason Roethlisberger is such a good foil for the Ravens is that he has a personal rivalry with Terrell Suggs. Since 2003, Suggs has seen Roethlisberger twice per season (sometimes with a third meeting in the playoffs). Nobody has his Roethlisberger more than Suggs, and the two players have a very respectful but contentious relationship.