It's possible that you've glossed over some of these because they're too "popular".
Maybe you've never heard of a few.
Regardless, these are albums that I think everyone should hear at least once if you're a novice metal fan or have been head banging for years.

1.Edge Of Sanity - Crimson

2.Summoning - Stronghold

3.Death - Human

4.Rush - A Farewell To Kings

5.The Angelic Process - Weighing Souls With Sand

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Listed in alphabetical order

1.Acid Witch - Witchtanic Hellucinations

2.Ahab - The Boats Of The Glen Carrig

3.Alcest - Les Voyages De L'âme

4.Amorphis - Silent Waters

5.Atheist - Piece Of Time

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My favorite metal albums sorted alphabetically by band name and chronological by release date.

1.Æther Realm - Tarot

2.Acid Witch - Witchtanic Hellucinations

3.Allegaeon - Proponent For Sentience

4.Amon Amarth - Once Sent From The Golden Hall

5.Amorphis - Tales From The Thousand Lakes

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This list includes death metal albums that musically are progressive and technical.. Alphabetical order.

1.Allegaeon - Proponent For Sentience

2.Atheist - Piece Of Time

3.Atheist - Unquestionable Presence

4.Atheist - Elements

5.Atheist - Jupiter

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These albums are fantastic musically but with minimal to no extreme harsh vocals. Perfect for someone who wants to start their metal journey.

1.Judas Priest - Screaming For Vengeance

2.Iron Maiden - Piece Of Mind

3.Black Sabbath - Paranoid

4.Dream Theater - Images And Words

5.Helloween - Keeper Of The Seven Keys Part I

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When it comes to both tone, feel, and skill these are my 25 favorite guitarists. I have had the pleasure of seeing many of them live. In alphabetical order by first name

1.

2.

3.

4.

5.

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Alphabetical Order. Categorized as OSBM based on the year of release and/or style of the music. Some minor gray area albums included.

1.Aeternus - Beyond The Wandering Moon

2.Amorphis - The Karelian Isthmus

3.Amorphis - Tales From The Thousand Lakes

4.Autopsy - Mental Funeral

5.Baphomet - The Dead Shall Inherit

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1.Riverside - ID.Entity

2.Steven Wilson - The Harmony Codex

3.Baroness - Stone

4.Haken - Fauna

5.Cattle Decapitation - Terrasite

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