I always have a hard time with these kinds of posts - because what is on the top of my list changes regularly - with mood, and with discovery of new artists, new releases. But anyway, here goes:
* Camel - is likely to be at the top of my list more often than not
* Genesis
* King Crimson, and other things Fripp
** Prog in general
* Eva Cassidy
* Patricia Barber
* Lisa Gerrard (Soundtracks, Dead Can Dance)
* Cowboy Junkies
* Mark Knopfler (and Dire Straits)
* Gene Clark
. . . I told you I have trouble with this . . . :-]