Outside of standard American I would put Scottish, British, French, Australian, Sri Lankan got to throw Irish in there too.
As far a single speaker I think it's hard to beat Ricardo Montalbán. He is just so cultivated, resonate, and regal. Just listen to him! https://www.youtube.com/watch?v=0tP5tZ_ekXs
Sofia Vergara and Penélope Cruz make my ears bleed. I can't stand to hear them, even-though in a few movies I think Penélope Cruz is a good actress. It's just hard to hear her butcher the language.







