No shit! Meyer is a mercenary just like Saban. You're splitting hairs trying to say which one is best. I think Meyer assembles the best coaching staffs, which makes him & his teams better. Saban is a micromanager, so he does not necessarily need the best coaches. He also developed the "analyst" positions you're seeing pop up now in CFB. Meyer is a motivator and Saban is a manager. Both are the best at what they do.
The bigger arguement here is: who is #3, 4, 5....?
It's like watching 2 Kenyans win a marathon....and the next guy is 2 miles behind (not even close).
Outside of Meyer & Saban you've got: Fisher (who is rapidly rising w the talent he's able to recruit), Miles? Patterson? Peterson? Stoops (falling stock), Harbaugh (we'll see), Franklin (jury is still out), Strong (jury is still out), Sumlin (will he ever find a Defense?).... There really is no strong #3/4/5 out there. They're all lumped together basically.