Don’t forget that Gurf produced three albums for Ray Wylie Hubbard between 1997 and 2005, Dangerous Spirits, Growl and Delirium Tremelos. There may be more.
If you like Gurf you’ll probably like Ray Wylie. Part II (the sober part) of Ray Wylie’s career started in 1992 with Lost Train of Thought. He’s put out a number of good albums. The ones Gurf was involved with are a good place to start or you can just start at the beginning. Definitely worth checking out.