I've been introduced to Abe Herbaugh's pipes and they are amazing smokers as well as attractive and comfortable. To me he is similar in style and engineering to Scott Thile. Maybe Scott helped him out at some point. I have a pipe from each carver that are so similar that it would be hard to even tell them apart except for a very slight difference in finish.
This fellow is from kalamazoo michigan. He is part of my pipe club and I own one of his pieces. Smokes very well, just wanted to help him out and help you all out with a phenomenal pipe artist. You can also find him on facebook at "RobE's Art".
Great list of North American artisan carvers. Though I am devoted to factory pipes -- the main brands and some of the domestic brands, I do have some artisan works. The late Bob Hayes, an award-winning N.C. carver, sold me a pipe at a jaw-dropping discount, my only bamboo shank pipe, a Dublin. Also, since 2002, I've bought about ten Jerry Perry pipes, about half in Mountain Laurel, that I greatly enjoy. Jerry only sells in person at the N.C. State Fair and TAPS pipe show; his independence is another of his salient virtues.