Dead1

Entombed - Clandestine (1991)
 

Annihilation of the Wicked is also my favourite Nile album. The first two tracks are unforgettable: the construction and evolution of the main riff in Dusk falls upon the Temple of the Serpent on the Mount of Sunrise throughout the track, Cast down the Heretic. These two tracks alone at the start of the album are well worth the diversions.
I really like In Their Darkened Shrines too (ahhhhhhh, Wind of Horus!).
I'm less familiar with Black Seeds of Vengeance, but you recognise Nile from the first few seconds of the first track. There's no mistaking it.

Fantastic choice!  I enjoy all of Nile's material, but those early albums especially had a ferocity and creativity about them.  "Annihilation of the Wicked" is my favorite Nile album, but "Black Seeds of Vengeance" and "In Their Darkened Shrines" are up near the top of the list as well!

Nile - Black Seeds of Vengeance (2000)
 

Atheist - Unquestionable Presence: Live At Wacken (2009)
 

Bizarrely not much metallic stuff being played!
 
Alice In Chains - Dirt
Faith No More - King For A Day....Fool For A Lifetime
Minor Threat - Complete Discography
The Ramones - Hey Ho Let's Go: Greatest Hits

Bizarrely not much metallic stuff being played!
 
Alice In Chains - Dirt
Faith No More - King For A Day....Fool For A Lifetime
Minor Threat - Complete Discography
The Ramones - Hey Ho Let's Go: Greatest Hits

Bizarrely not much metallic stuff being played!
 
Alice In Chains - Dirt
Faith No More - King For A Day....Fool For A Lifetime
Minor Threat - Complete Discography
The Ramones - Hey Ho Let's Go: Greatest Hits

Bizarrely not much metallic stuff being played!
 
Alice In Chains - Dirt
Faith No More - King For A Day....Fool For A Lifetime
Minor Threat - Complete Discography
The Ramones - Hey Ho Let's Go: Greatest Hits

Morbid Angel - Blessed are the Sick (1990)
 

Morbid Angel - Altars of Madness (1989)
 

Leather Brigade - Pray to the Knife
Blackened speed metal ala early Sodom etc.  Very good.
Out now on Vicious Witch Records
 
 

Edge of Sanity - Purgatory Afterglow
Ah crap!  

Bad news, mate. I saw them - well, I walked out after 10 minutes or so - a few years ago. I went to the show to see Fallujah who were their support band (and who were awesome), Killswitch Engage sucked badly.

At The Gates - Terminal Spirit Disease
Nifelheim - Devil's Force 

At The Gates - Terminal Spirit Disease
Nifelheim - Devil's Force 

Totally agree.  
 
Every single interview I've read with every single early thrash metal and many early death metal pioneers shows they had as much appreciation for punk/hardcore as they did for metal.

Just like with the formation of any new sub-genre there were many 70's bands who contributed to the overall advancement of the heaviness of hard rock and helped push it over the line into heavy metal, and then onto extreme metal. I'll agree with you on Sabbath and the Pistols being two of the pillars, although I would have to add the Ramones. Musically they were a bit harder, faster and more "extreme" than the Pistols by 70's standards, especially live. They formed a year earier ('74) and dropped their album in '76, a year before the Pistols' record. Gotta say though I've always wondered what musical path the Pistols might have taken if they hadn't imploded on their first and only US tour less than 3 months after their first and only album had come out. One of the great debut albums in punk, and even just in rock history.
And of course we can't forget Motörhead who like the Sex Pistols formed in 1975. When talking about 70's bands, I don't think Motörhead's influence on the formation of thrash and the more extreme forms of metal could possibly be overstated. Motörhead made all the other 70's hard rock bands sound weak by comparison until Venom hit the scene. Venom formed in '78, but most of us who don't live 'oop north' near Newcastle didn't hear them until their first album dropped in Dec '81. 
Motörhead was also a major influence on hardcore punk, or more specifically on the direction some UK bands like Discharge and GBH and how they took the late '70's budding American hardcore punk sounds of bands like Black Flag, Middle Class and Bad Brains and heavied it up, making it quite a bit more extreme by the time they started putting their albums out in the early 80's. Early Discharge releases Why and Hear Nothing Say Nothing... still sound extreme by today's standards over 40 years later. Why came out April '81, 8 months before Welcome to Hell and was every bit as extreme.
I know most metalheads like to keep punk and metal separate as if they had nothing to do with each other, but imo bands like Motörhead, Venom and Discharge all exist in that space where metal and punk converge. So when we're talking about late 70's or very early 80's influences on extreme metal I think those were the three most extreme bands for their day.
 
If I didn't know better I would've thought it was Ghost!

I get to see these guys as they are supporting Iron Maiden next year.
 
Not a fan of their music (save one song) but am curious to see how they go live.
 
Sadistic Intent - Resurrection of the Ancient Black Earth
Superb mid 1990s death metal.
 
 

Morbid Angel - Blessed are the Sick (1991)
 

Deicide - Deicide (1990)
 

Bloodbath - The Fathomless Mastery (2008)
Obscure Sphinx - Epitaphs (2016)
 

Forbidden - Twisted Into The Form
Metallica - Ride The Lightning
Motorhead - Orgasmatron
Testament - The New Order

Careful man, lumping Rush in with Quiet Riot and Twisted Sister might get you banned.
 
 
The Crazy World Of Arthur Brown is always a good look. Late 60s psych rock, flaming headgear, something like "corpse paint", nuns having fun, high wailing vocals. A precursor to your Kings Diamond if not your Priests Judas.
Fire:
Nightmare: