I, for one, would choose His Grace, His Excellency, The Duke of Ankh, Commander Sir Samuel Vimes. Sure, Vimes would probably figure out something I'm guilty of during the week, but damn if he wouldn't be the most interesting guy to talk to.
If not him, Detritus, Angua, or Lord Vetinari would work, too.
If not him, Detritus, Angua, or Lord Vetinari would work, too.