Has to be "And Justice For All..." by Metallica for me with "Vulgar Display of Power" by Pantera a close second.
My favourite Metallica that...hypnotic metal, even a little proggy. Have you heard the Justice for Jason unofficial remasters? There's quite a good one out there but can't remember which as looking now youtubes is swamped by different versions.
I used to like Pantera, tho' the music hasn't aged well.
Machinehead's Burn My Eyes is still decent if you're in the mood for massive riffs and deep drums.
Headswim - Flood was an underrated killer borderline-metal album with soul. Saw them live back then, thought they were gonna be huge but it never happened.
Some Opeth is good tho' I prefer their milder proggy-rock stuff over the older black metal stylings. Don't normally like that throaty growly metal voice, Dimmu Borgir are an exception, who are ridiculously theatric in a fun way!