can't listen to a whole cd of Steve Earle.

ditto Emmylou Harris.
I love Sinatra's voice but also can't abide Judy Garland's (or Dinah Shore's either for that matter)

with Earl and Harris though it's not the voice, it's the song selection. F'rinstance I love John Prine and Kate Wolf. Earl and Harris cds seem to be full of filler songs---you know, "well, we gotta put SOMETHING on here to fill the rest of the cd."