John Ringo. He’s funny, he writes science-fiction set in this world and urban fantasy that seems just as plausible. I believe he could totally write a biography about a normal person and make their life something most could read.
If he wasn’t available I’d go for Brandon Sanderson or Neil Gaiman. Sanderson because he has come into his own as a writer in the “epic” side of fantasy and I believe could weave a tale of suspense of even the most mundane of things. Gaiman because his perception of this world and all those in his head are something like 217 degrees left of “normal” which is awesome.