well ... if we could choose anyone I'd probably go with Marina Sirtis (Councellor Troi from Star Trek TNG -- minus the fake "alien accent") ... she has the most soothing voice.
But on a more "realness" tip: Shohreh Aghdashloo (you may remember her from this)
Seriously check this voice out: https://youtu.be/kAKJoEO21s0?t=30s
it's actually in a lower register than mine. If I could figure out how to do what she does with hers, I'd never have a problem passing again!
