I'm a big fan of the Dresden Files books, by Jim Butcher. I have recently been enjoying the audio book versions. Most of the 17 books are available read by James Marsters.
I would really enjoy a Waze app voice pack, based on James Marsters portrayal of the Harry Dresden character. (Maybe Jim Butcher himself would be willing participate)
I'm sure other Dresden Files fans would also.
Other characters from the Dresden Files, such as Molly Carpenter and Demonreach. Would be a bonus.
I think the female voice actors for Molly vary, but I'm pretty sure J. Marsters does the voice for Demonreach.

Other celebrities I have thought of for potential voice packs; Robin Williams, James Earl Jones, & Jack Nicholson.