I've seen so many of my favourite bands lots of times, so I'll narrow this down to the ones that I've never seen or only seen once or twice.
-Sirenia
-Revamp
-Solstafir
-Midnattsol
-Chthonic
-Manegarm
-Kivimetsan Druidi
-Draconian
-Orden Ogan
-Powerwolf
-Heidevolk