The Reaper one from Children of Bodom. Oh wait all the covers have reapers on them...
-goes to look at MA-
"Follow the Reaper" - CoB
It blew my mind at the time, I was obsessed with them for about a year. Now the keyboards annoy me and the melodies sound predictable, the solos suck, and the vocals kinda annoying... but still, it got me into "extreme metal" so I thank it for that.
They do still have some really cool harmonies in some of their songs though.