You say that like he was some pedestrian QB who just played on great teams.
Brady holds many quarterback records, including combined passing yards (91,653), regular season touchdown passes (581) and career touchdowns (664), in addition to the most Pro Bowl selections (14, tied with 4 others) and the second-most regular season passing yards (79,204).
Also - quarterback is the single most influential position for winning in any team sport...and it's not even remotely close. I'm not saying it's the be all, end all - but it matters more than winning in other sports does. That also makes it difficult to compare across other sports.