First Wave Black Metal/Blackened Thrash

Well...I guess there's the really obvious Celtic Frost, Hellhammer, Venom, Bathory, etc.

So everyone leave those off your lists.
 
Bulldozer - IX
Flames of Hell - Fire and Steel
Master's Hammer - Demos / Ritual
Mayhem - Deathcrush
Mefisto - The Truth
Parabellum - Tempus Mortis
Root - Zjevení / The Revelation
Sabbat (Jpn) - Born By Evil Blood
Sabbat (Jpn) - Envenom
Sarcofago - INRI
Sarcofago - Rotting
Sodom - In the Sign of Evil
Tormentor - Anno Domini
Vulcano - Bloody Vengeance
 
Aura Noir is the only band that comes to mind right now in terms of blackened thrash. I'm not really a fan of the style though.