Not sure how obscure we're allowed to go here but I'm gonna submit Bison (B.C.) They're supposed to be going out in support of High On Fire's headlining tour sometime soon so many who've never heard or heard of them soon will.
And,If they're too unknown, I'll submit the mighty Sabbath instead.
So far at least, 2011, 2012 & 2015 were enough for me Book 'em ANDO!!