Why not? One per band. 

[hider=big list, no order]
Opeth - Blackwater Park 
Mastodon - Leviathan 
Gojira - From Mars to Sirius
ISIS - Panopticon 
Behemoth - The Satanist
Dissection - Storm of the Light's Bane 
Immortal - At the Heart of Winter
Metallica - Ride The Lightning 
Agalloch - The Mantle 
Protest the Hero - Fortress
Baroness - Red Album
Torche - Admission
Megadeth - Rust in Peace
Lamb of God - Ashes of the Wake
Death - Sound of Perseverance 
Meshuggah - Koloss
System Of A Down - Toxicity
Insomnium - Heart Like A Grave
Black Sabbath - Master of Reality
Machine Head - The Blackening
The Contortionist - Language
Pantera - Vulgar Display of Power
Jinjer - King of Everything
Deftones - White Pony
Type O Negative - Bloody Kisses
[/hider]