The only bad thing about this list is that it's compiled by NME, so it's mainly going to be ultra-accessible doom/stoner metal. No real "heaviest metal records of all time" is real until a Bolt Thrower album is on it. That's not bias, it's just the truth.
12/07 - Exodus
12/08 - Blackalicious
12/11 - Saves The Day
12/16 - Pallbearer
12/18 - Orange Goblin OR Wolvhammer