There are many I would love to meet. Keith Emerson, Stevie Wonder, many others, but the guy I'd really love to meet and have some time with would be a guitarist by the name of Les Paul. I'm sure you've all heard of him.
He comes from a small town just west of Milwaukee called Waukesha where there is The Les Paul Museum. I hear he is just a super person.
Last fathers day a local radio station had the whole day dedicated to him as "the father of the electric guitar. He is an astounding man, a great innovator/inventer responsible for a lot of what we hear on every recording we listen to.
A link for you to enjoy. http://en.wikipedia.org/wiki/Les_Paul

Jim