Well in the movie it was Kevin Spacey, and I was A-OK with that. Nice pleasant voice on that guy. The most pleasant would be Jeff Bridges. When I was working he'd be in Duracell batteries mode, when I was relaxing (with some CCR and a doobie) he'd be in Lebowski/Tron mode.
But if I wanted to get shit done, I'd have Patrick Warburton for sure. When Brock Samson says "quit screwin' around", you quit screwin' around!