Interesting topic- I could think of a number of people but I think it would have to be someone who is an experienced radio/stage actor and performer as so much focus would be on the voice.
I consult my shelf of audiobooks for inspiration, and to my credit there are many good nominations: Terry Molly, a highly experienced radio actor who is famous for his long running role of Milkman Mike Tucker on long running radio soap opera “The Archers” and as the third actor to play Doctor Who’s arch nemesis and creator of the Daleks, Davros.
David Troughton, an esteemed actor and son of the late great Patrick, he sounds very much like his father and has great staying power. He surprisingly often plays hard men and gangsters, notably in the series New Tricks.
Geoffrey Beavers, a radio stalwart who played the disfigured Master in the Keeper of Train. He has a smooth silky voice which would certainly make for an engaging read.
Historically I would nominated the late great Peter Sellers of Pink Panther and Goon Show fame or possibly the guy who did the melodramatic voice overs on movie trailers back in the day, but the condition he performed every entry in that style.
Another alternative would be Michael Jayston, who was the reader of a recent release of the James Bond books on audio, some of which were broadcast on BBC Radio 4.
I’m torn, there are plenty of interesting choices…. I think I will plump for Geoffrey Beavers.