For me, Clive:
1 - Sabbath - The originators and still those first six albums almost 50 years later still sound heavy as fuck
2 - Slayer - When I was a teenager metal began and ended with Slayer for me. When I first heard Reign In Blood, it blew my mind and must have been the album I listened too most between ages 15-18. The weekend was all about getting down to the local metal club and sticking in as many requests for Slayer as possible. Then me and my mates would all form a big circle, arm in arm and headbang til my neck fell off
3 - Sleep - Jersusalem and later, Dopesmoker, was easily one of my most listened to albums of my 20s. Seeing them at ATP was an incredible experience and one I never thought would happen
4 - Pantera - The other Slayer of my teenage years, the one that got me into metal in the first place. I knew there was a certain sound I really wanted to listen to but back then there weren’t the resources to find out about this stuff. I was on a bus to a hockey match and one of my mates and aye were sharing earphones. He put on Vulgar Display of Power and within seconds of hearing that first riff, I knew this was what I’d been looking for
5 - I suppose it has to be Metallica. In the same way as Nevermind, I think I overdosed on Metallica in that I 100% got all the enjoyment that I could out of that band and feel no compulsion to ever listen to them again. I’ll occasionally listen to Kill 'Em All these days but other than that, I don’t get excited by the music any more.
6 - Harvey Milk - A Small Turn of Human Kindness is a masterpiece of an album. Creston has one of the most incredible metal voices ever and their experimentation and humour keeps the music interesting.
7 - Sepultura - I almost exclusively listen to Beneath The Remains, Arise and Chaos AD but they’re more than enough. Again, Max has a brilliant voice.
I wouldn’t consider these ‘Metal’ but the other bands in and around that area I’d add in here would be
Melvins (Probably in #2 spot)
Faith No More
Depending on mood, maybe Electric Wizard would sneak in at 8