Your Top 5 Albums (by bands you've heard 5 albums from)

Aeternus:

1. Beyond the Wandering Moon
2. And So the Night Became
3. Dark Sorcery
4. Ascension of Terror
5. Shadows of Old


Amorphis:

1. Elegy
2. Tales From the Thousand Lakes
3. Eclipse
4. Silent Waters
5. Tuonela


The Chasm:

1. Conjuration of the Spectral Empire
2. Farseeing the Paranormal Abysm
3. The Spell of Retribution
4. Procession to the Infraworld
5. Deathcult for Eternity

Edge of Sanity:

1. Unorthodox
2. Purgatory Afterglow
3. Spectral Sorrows
4. Crimson
5. Cryptic


Hypocrisy:

1. The Final Chapter
2. Fourth Dimension
3. Hypocrisy
4. Abducted
5. Osculum Obscenum


Immortal

1. Blizzard Beasts
2. Pure Holocaust
3. At the Heart of Winter
4. Diabolical Fullmoon Mysticism
5. Battles in the North


Manowar:

1. Into Glory Ride
2. Battle Hymns
3. Hail to England
4. Kings of Metal
5. Sign of the Hammer


Neurosis:

1. Times of Grace
2. Through Silver in Blood
3. Enemy of the Sun
4. Honor Found in Decay
5. Eye of Every Storm


Primordial:

1. Spirit the Earth Aflame
2. A Journeys End
3. Storm Before the Calm
4. To the Nameless Dead
5. The Gathering Wilderness


Rotting Christ:

1. Theogonia
2. Sanctus Diavolus
3. Thy Mighty Contract
4. Aeola
5. Non Serviam


Type O Negative:

1. October Rust
2. World Coming Down
3. Bloody Kisses
4. Slow Deep and Hard
5. Dead Again


Virgin Steele:

1. Marriage of Heaven and Hell Part I
2. House of Atreus Act I
3. Marriage of Heaven and Hell Part II
4. Invictus
5. House of Ayteus Act II
 
Defenders isn't that good. Remove Hell Bent too and you should easily be able to make room for the classic Sad/Sin/Stained run.
 
The best Judas Priest list:
1. Sad Wings Of Destiny
2. Stained Class
3. Sin After Sin
4. Whatever's Not Playing
5. Whatever's Playing On Mute
 
Electric Wizard
1. Electric Wizard
2. Dopethrone
3. Black Masses
4. Witchcult Today
5. Let Us Prey

Cradle of Filth
1. Midian
2. Dusk and Her Embrace
3. Cruelty and the Bease
4. Bitter Suites to Succubi
5. Godspeed On the Devil's Thunder

Draconian
1. Arcane Rain Fell
2. The Burning Halo
3. Where Lovers Mourn
4. Dark Oceans We Cry
5. The Closed Eyes of Paradise

Trouble
1. Trouble
2. Manic Frustration
3. The Skull
4. Plastic Green Head
5. Psalm 9

Theatres des Vampires
1. The Vampire Chronicles
2. Bloody Lunatic Asylum
3. Lubilaeum Anno Dracul
4. Nightbreed of Macabria
5. Desire of Damnation

Type O Negative
1. Slow, Deep and Hard
2. October Rust
3. Bloody Kisses
4. Origin of the Feces
5. Life is Killing Me

Iced Earth
1. Horror Show
2. Days of Purgatory
3. The Glorious Burden
4. The Crucible of Man
5. Plagues of Babylon

Candlemass
1. Epicus Doomicus Metallicus
2. Dactylis Glomerate & Abstrakt Algebra II
3. Chapter VI
4. From the 13th Sun
5. Nightfall
 
Candlemass:
1. Epicus Doomicus Metallicus
2. Tales Of Creation
3. Nightfall
4. Ancient Dreams
5. No.
 
Obituary:
World Demise*
Cause of Death
Slowly We Rot
The End Complete
Inked in Blood (this will change probably)

Suffocation:
Pierced From Within
Effigy of the Forgotten*
Pinnacle of Bedlam
Breeding the Spawn
Self-titled

In Flames:
Whoracle*
The Jester Race
Reroute to Remain
Come Clarity
Clayman (I guess. Need to revisit this band)

Amon Amarth:
Versus the World*
The Crusher
Avenger
Deceiver of the Gods
With Oden on our Side
 
Whoracle is your fav from In Flames? It's a simple choice between Colony, Jester Race and Clayman I think. I didn't even take Whoracle into consideration although it contains Jotun and The Hive.