Doom metal arguably could be said to have peaked in the 90's. Revelation, Scald, Solitude Aeturnus, Solstice, Iron Man...
Though I think it's just more a case of doom metal being very very consistent.
Revelation and Solstice over Candlemass, Trouble, Pentagram, and Saint Vitus?
Agreed. The 80's saw the birth of black, death, glam, and thrash metal, part of the NWOBHM, the formation of dozens of metal's greatest bands, heaps of classic records every year, etc.I see tons of depth in the 80's. Absolutely tons.
Ooh hard one. If I'm being totally honest:
Revelation > Saint Vitus > Trouble > Candlemass > Solstice > Pentagram
Bear in mind these are literally some of my all time favourite bands, ever.
Second-rate Demolition Hammer, which is basically what they were (an ex-member or two).
That's okay. It's already pretty much confirmed that you're bad at listening to singers since you tried to say that Chuck Schuldiner sang "Painkiller" better than Rob Halford.