in the classical world i'd submit Ben Tortorici:
http://www.tortorici-guitars.com/
not really new to building but still under the radar. he just builds
awesome sounding classicals. i've been playing guitar for over 29 years and have
never heard an instrument like the one I played last year -before or since. it just sounded so amazing that i had to fight back open weeping in the guitar store because it sounded so good.