Here are a few.
Richard Thompson - In my view the undisputed king.
The Strawbs - They have remained a consistent favorite while some others have drifted in and out of favor.
Fairport Convention in the Sandy Denny era.
King Crimson - The first three albums mainly.
Yes
Big Big Train
Mostly Autumn
Karnataka
Pink Floyd
ELP
Chris Rea
Genesis up to the departure of Steve Hackett, from that point on they belong on the "do not get" list.
Deep Purple.
Neil Young
Al Stewart
Five Hand Reel
Steven Wilson (Blown away by the recent album "The Raven who Refused to Sing")
Yazoo (the only 80's synth pop band that really appealed to me.)
And a special mention for "The Golden Star Band" My favorite Filipino cover band from a very sleazy Dubai back street bar.