I knew he had done at least one voice-only role but couldn’t think of it. So I headed straight for IMDb and apparently he’s done a pretty good chunk of voice work.
Call me a nerd, but I’d like Zooey Deschanel. She could sing me goodnight, too.
Perfect choice!
Runner-up: Patrick Stewart.
Hmm - like others, I’ve put way too much thought into this, and I don’t even have a definitive winner. But a short list I’m considering:
From audiobooks:
Simon Jones
Christina Moore
Gerard Doyle
Actresses:
Shiri Appleby
Amy Acker
Lexa Doig
Jewel Staite
Joanna Garcia
Allison Mack
Kristen Bell
Lexa Doig might be the front-runner just for the fun value. I’m a trek fan, but you can keep the voice of the Federation computers. I want my house to have the voice of the Andromeda Ascendant! 
Perhaps we did, just not in any of the posts you mentioned 
Either Sean Connery or James Earl Jones, although I could live with Morgan Freeman’s voice.
Steven Blum, hands down
Sara Teasdale
(as long as we’re allowing zombies…)
Hugh Laurie in his House role (no pun intended)
The first choice for the automated house was Matthew Perry:
“Could I BE any more of a house?”
My choice? Elizabeth Peña.
Marvin, the paranoid android…The guy who did ther voice in the 80’s series, not Alan Rickman.
CL4P-TP (aka Claptrap), from Borderlands.
James Earl Jones or Morgan Freeman.
Bob
Early Judy Garland, in her breathless teenager phase from the Mickey Rooney movies or Wizard of Oz. “Oh! There’s someone at the door! Shall I see who it is?” That sort of thing.
Alternate: early Marlon Brando, especially in his character from Streetcar. He would keep trying to tell me that he was the king in this household, and I would cut him off and switch over to Blanche’s voice.
John Cleese - set on “sarcastic”.
Sovereign, from Mass Effect.
Kathleen Turner in her Jessica Rabbit voice.
Just noticed that there are 5 different now-banned users. Can i get them to be my robo-house-voices?
Douglas Rain