Some of my all-time favorites bands/artists are probably Iron Maiden, Ronnie James Dio, Manowar, Megadeth, Pantera (especially late 80s), Watchtower, Voivod, Forbidden, Suicidal Tendecies, 3 Inches of Blood, Morbid Angel, Adramelech, Nile, Behemoth , Cannibal Corpse, but also Hammerfall, Finntroll, Svartsot, Furor Gallico, Ensiferum, Eluveitie, Alestorm... The list is pretty long