I'm listening to a fantastic audiobook right now: A History of the American People by Paul Johnson, read by Nadia May
Other good non-fiction audiobooks:
Lords of Finance: The Bankers Who Broke the World by Liaquat Ahamed, read by Stephen Hoye
The First Tycoon: The Epic Life of Cornelius Vanderbilt by T.J. Stiles, read by Mark Deakins
The Guns of August by Barbara W. Tuchman, read by Nadia May
Good fiction audiobooks:
The Martian by Andy Weir, read by R.C. Bray
A Man in Full by Tom Wolfe, read by David Ogden Stiers
David Ogden Stiers is one of the best readers ever. He's the guy who played Charles Emerson Winchester III on M.A.S.H.
Nadia May is also a very good reader, although she mispronounces a number of American places since she's English.
Another good reader I remember from way back is Joe Mantegna.
A shitty reader can totally ruin an audiobook. I've stopped listening to quite a few just because the reader sucked that much.