One Album Wonders

]Borknagar - Quintessence (?)

I don't really think so. If anything, I think The Olden Domain would be preferred, by most, over Quintessence. And on top of that, I'd say that their first five albums were pretty well-received.

I feel like Amorphis aren't really known for any single album, though; Tales is pretty big as well.

Very true; and in all honesty, their two most recent albums have really drawn in a huge crowd of listeners. People on this thread keep listing their own personal preferences. The truth is, their two most recent albums have been well-received and praised.

People need to separate their own interests and likes from the facts. Just because some people here only like The Karelian Isthmus doesn't mean that that album was Amorphis' only hit. In truth, they've been very successful.
 
Tormentor - Anno Domini
Nazxul - Totem
Hail - Inheritance of Evilness
Nefandus - The Nightwinds Carried Our Names
Manes - Under Ein Blodraud Maane
Order of the Ebon Hand - A Mystic Path to the Netherworld
 
Oracle (Gibraltar) - Oracle

not that anyone on here other than me and Omni has heard of them...
 
Dark Angel is questionable

How about Exodus (Bonded by Blood, obviously).
Also maybe Sepultura (Beneath The Remains).
Napalm Death (Scum) maybe?
Orphaned Land (Mabool)
Annihilator (Alice In Hell)

disagree with all of those except Orphaned Land (who I've never actually listened to). Napalm Death - FETO was even better than Scum, and have you even listened to Never, Neverland? that album is a thrashterpiece.

edit: weird, you said "thrashterpiece" earlier in the thread and I didn't even notice!
 
blasphemy's second album gets mentioned plenty tbh. so do various godflesh albums although maybe not in the metal community. demoncy's 'sylvan realms' is nearly as well regarded as JiD, or at least it used to be. don't really agree with blut aus nord either, the early stuff is really highly regarded by those who've heard it, and these days a lot of people have. or arghoslent. or loads of others mentioned here actually. 'only known for one of their albums' does not mean 'has one album that's a bit more well known than the others'
 
Acrimony- Tumuli Shroomaroom (only released 2 albums, this is the best)
Botch- We Are The Romans (best/best known)
Gory Blister- Skymorphosis
Skinless- Trample The Weak, Hurdle The Dead (not to say the others aren't good, but this is by far their best)