Some of the best metal albums ever released have been by bands that only had one full length release.
List is (and probably always will be) a constant work-in-progress.
If you know of a "one-and-done" metal band/album that isn't on my list, feel free to recommend

1.Weakling - Dead As Dreams

2.Caladan Brood - Echoes Of Battle

3.Lykathea Aflame - Elvenefris

4.Timeghoul - 1992-1994 Discography

5.Thorns - Thorns

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1.Abyssus - Into The Abyss

2.Acephalix - Decreation

3.Ascended Dead - Abhorrent Manifestation

4.Auroch - From Forgotten Worlds

5.Auroch - Taman Shud

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This list is meant to be an extensive, but by no means exhaustive, collection of the greatest (modern) metal albums and eps. Running the gamut from avant-garde to trve norweigan black metal. *As someone who is young in age, my tastes tend to revolve around the period of the 80s to the present.* Although certain metal albums from before will certainly be featured, the period of the 60s-70s will be under-represented. I refer you to this excellent list to gain a better appreciation for some of the best metal from that period: https://rateyourmusic.com/list/freis/martin_popoffs_the_top_500_heavy_metal_albums_of_all_time/

1.S.V.E.S.T. - Veritas Diaboli Manet In Aeternum: Le Diable Est Ma Raison

2.Sabachthani - Miserable Endings

3.Sabaoth - Les Illuminations

4.Sabaton - Carolus Rex

5.Sabbat - Dreamweaver

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Top 100 albums of 2010-2019

1.40 Watt Sun - Wider Than The Sky

2.Bell Witch - Mirror Reaper

3.Esoteric - A Pyrrhic Existence

4.Elysian Blaze - Blood Geometry

5.Emptiness - Nothing But The Whole

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Here's a little list displaying my personal favorite death metal albums, based on the same idea as my heavy metal list, thus stressing the raw and the genuine. For me death metal has to be crushing, then coloured with atmosphere. Some of my choices may seem exotic, considering the list overall, but it's what broadens it. Rules : one album per band, the order isn't strict (still bottom albums are weaker than their predecessors). Many good tbdm bands are lacking, mostly because of their unfitting sound. If you think some kick-ass piece are missing, don't hesitate to suggest them. Enjoy.

1.Carcass - Necroticism: Descanting The Insalubrious

2.Suffocation - Pierced From Within

3.Cynic - Focus

4.Septicflesh - Εσοπτρον

5.Death - Symbolic

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My favarite death metal records. I avoided making this list for long because
a) I've suggested many of these albums on the lists of the others
b) many of them appear on my other lists
c) my knowledge on OSDM is extremely shallow
In the other words, this is a shit list and I admit it. Any help for improvement in the form of suggestions is appreciated.

1.!T.O.O.H.! - Pod Vládou Biče (Under The Reign Of The Whip)

2.Abyssal - Novit Enim Dominus Qui Sunt Eius

3.Adversarial - Death, Endless Nothing And The Black Knife Of Nihilism

4.Altars - Paramnesia

5.Antediluvian - λόγος

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1.Sólstafir - Ótta

2.Nightbringer - Ego Dominus Tuus

3.Sabaton - Heroes

4.Dark Fortress - Venereal Dawn

5.Lux Occulta - Kołysanki

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2014 was great year, especially for black metal. Here are my most favorite records of the year. Open to suggestions, as always.
Edit: I might have a little of change in the order of albums at the end.

1.Qualeaceans - Capture Of Ziz

2.Emptiness - Nothing But The Whole

3.Schammasch - Contradiction

4.Execration - Morbid Dimensions

5.Darkspace - Dark Space III I

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Cos, y'know, same shiz different year. Ran out of space again so will post final album opinions in comments.

1.Infestus - The Reflecting Void

2.Dirge - Hyperion

3.Nero Di Marte - Derivae

4.Steve Rothery - The Ghosts Of Pripyat

5.Agalloch - The Serpent & The Sphere

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The 50 albums worth remembering that I've come across from 2014.

1.Arizmenda - Stillbirth In The Temple Of Venus

2.Dead Congregation - Promulgation Of The Fall

3.Vanhelgd - Relics Of Sulphur Salvation

4.Horrendous - Ecdysis

5.The Great Old Ones - Tekeli-Li

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