This guy is pretty incredible. Writes and plays all the instruments/vocals himself, though he of course tours with others. I really love his voice and he's one of my favorite folk/power metal artists. Recommended if you are fond of Tyr or viking themed power metal. He has only one solo full-length, but it is quite awesome. One of my favorites:
Vengeance Part II: ...And The Effect
https://www.youtube.com/watch?v=HiRl1X0vNms