Its funny how Kanye always favored Cudi and Pusha, but when we really look at it, Big Sean has helped Kanye the most. M&C was a huuuuuge hit, and Sean is the final addition that really made GOOD Music a crew that can compete with YMCMB and MMG, b/c of all his mainstream success.
I mean hell, the simple addition of "swerve" made Mercy quite the quotable song.
This isnt to say that Pusha n Cudi arent great members of GOOD, but the Kanye West/Big Sean contrast is just too unique when you have Kanye's artistry siding with Sean's catchiness. Theyre kindve like the next line of the Jay-Z/Ye brotherhood.