Sanderson is one of the best fantasy authors out there today, I think. His Way of Kings series is quickly becoming one of my favorites and only two out of ten books have been released haha.
He by far has the widest reaching epic I've encounter. His creation of the cosmere is something that I couldn't even imagine doing with fiction. The Elantris series, the Stormlight Archives, the Mistborn Series, The Warbreaker series. The idea that in some way all of these worlds are connected, and somehow share elements is unbelievable. When Sanderson finishes his work the Cosmere is going to be the largest epic collection of all time.
See, but that is part of the system. His three laws encompass what magical systems have to be about. The magic itself, the limitations of that magic on people, and how that magic links with the world around it. It is because he builds magic systems like these that they work so well.