I have been thinking about this . I have my Alexa device read one of my kindle books each night but given the choice of a voice I would love Kirsty Young or Ken Bruce. By the wy I am loveing Kirsty's podcasts called " Young Again " on BBC sounds .
Michael Palin usually sends me off to sleep. I often listen to one of his travel books and as there isn’t a plot, it doesn’t matter if you wake up and have missed a bit.
I love to listen to the music that comes on before the Shipping Forecast at around 12:45 It is called Sailing By. I have it recorded on Alexa so if I fall asleep too soon I can play it in the middle of the night when I wake and can't get back to sleep