7. Mick Jagger/Keith Richards
Mick Jagger and Keith Richards are complete opposites in many ways, but over the course of 50 years they have worked together to craft one of the most memorable catalogs in rock history. Unlike Lennon and McCartney, they continued to write together even as their personal relationship went through a series of rough patches. Both artists have tried a few times to launch solo careers, but they quickly returned to The Stones. The group hasn't toured since the summer of 2007, but a 2012 tour seems like a possibility.