You can't go wrong with the "first wave" of black metal. I think for people who don't understand the lofi thing, listening to the first wave will show you what later bands like Darkthrone or whoever were emulating. Venom, the first 3 Bathory albums, Sodom demos, Tormentor, the first Slayer album, Mercyful Fate, Sarcofago, Hellhammer, Bulldozer, early early Kreator and Destruction. There are also bands like Possessed, Messiah, Master, early Sepultura and Death that are usually categorized as death metal but they all existed concurrently in the mid 80s making similar Venom/Slayer inspired music before terms like death and black were defined.
The foundation for everything that exploded out of NY, Sweden, Florida and Norway in the 90s can be found in these bands. The more I listen the more this becomes one of my favorite eras.