Goes without saying, I'd love a Keith David or James Earl Jones AI. I just love them as actors/voice actors.
James Earl Jones is a no brainer imo. I heard a friends sat nav with Darth Vader's voice, not sure if it really was James Earl Jones but it was good. My mate missed a turn on purpose... The sat nav replied "I find your lack of faith disturbing" lol.
One voice I would like as an option is Alexander Scaarsgard, he's Pennywise in the remake of the Stephen King classic IT. Others include Tim Curry (also Pennywise) originally and Alan Rickman or Robin Williams who are no longer with us. The last two could be hilarious imo, possibly too distracting if done right.