Not sure what you want to know... Yes, even if USF would be completely unplayble, there still would be a no 1 ranked player for that faction (and any other rank after that of course).
Maybe the "Basics" section this article helps?
Great article man, I always tune into your post tournament strategy/BO/Meta analyses. Having read through it would I be right to say that the present state of your chosen faction in the meta has minimal/zero bearing on your ability to climb up or down the ranked ladder? Well, besides your ability to adapt to balance patch changes I suppose, but the true "power level" of your faction at that state in time in 1v1s has little impact.