The short list I saw didn't have Elan Musk, did you mean Elon Musk from Space X & Tesla? He'd certainly be a great choice but I sure he's smarter than that. The short list I saw was former MS personnel:
Jim Allchin, Brad Silverberg, Paul Maritz, Nathan Myhrvold, Greg Maffei, Pete Higgins, Jeff Raikes, J. Allard, Robbie Bach, Bill Veghte, Ray Ozzie, Bob Muglia, Steven Sinofsky, and B. Kevin Turner, Microsoft's Chief Operating Officer (COO)