Luke-warm take: Neither BB or TB go on to be successful alone. They need each other. TB has the tools, mental processing, competitiveness to run BBs style of offense. BB needs Brady to executive/adapt to complex and ever-changing styles of play. If TB is on another team, he's a decent QB, but he struggles through coaching changes, scheme changes, and coaches forcing him to play to his weaknesses sometimes. He ends up being more an Eli or Joe F. If BB doesn't have TB, he's still a good coach, but not dominant. Probably cycles through 2-4 QBs in his career that all produce varying levels of success. Perhaps he wins 1-2 Super Bowls still.