I would like to meet Thomas Jefferson - I can think of so many questions I would like to ask him.
As for living people:
Bowie - been a big fan since the early 70's - would like to see and discuss his painting/sculpting as well as music
Sting and Trudy - I would like to ask him how he has discussed having wealth and privilege and it's relationship to his charity work with his children - since he was a teacher, I think he would have some really great ideas on getting children interested in charity work -- and I am a big fan of his music. I'm not sure what I would ask her but I would love to talk to her - one thing I would ask her was how it felt to have the birth of one of your children included in a concert video - I can't remember which one, but I saw a Sting program on tv and at the end he left the concert and he and Trudy had the labor and delivery filmed and included in the program.
Laurel K Hamilton - love her books, would like to hear her thought process on plots and character development
Stephen King - same reason as Hamilton