Metal Mondays featuring the most metal band ever...Dethklok!
I know they don't technically exist, per se, but their music rocks! They reigned on the Metal charts for months with their number 1 albums Dethalbum and Dethalbum II. Check out the Adult Swim Metalocalypse phenoms awaken the Lake Troll, Mustakrakish. And seriously, what is more metal than that?