I'm a bit more than a casual fan of the genre.
Here's my lists of releases I like.
TECHNICAL/PROGRESSIVE/COMPLEX DEATH
Absonant Cadence (Inside Out-Life)
Absorbed (Avowals compilation)
Acid Death (Random's Manifest)
Alarum (Promo 2002, Eventuality)
Aletheian (Dying Vine)
Algophobia (s/t)
Amnesia (Land of No Return)
Amok (Lullabies of Silence)
Anomalous (Cognitive Dissonance EP)
Atheist (Unquestionable Presence, Elements)
Aydra (Icon of Sin, Hyperlogical Non-sense)
Banisher (Sorrow of Death Demo)
Brain Drill (The Parasites EP)
Canvas Solaris (Promo 2001)
Capharnaum (Fractured)
Carcariass (Killing Process)
Centaurus A (Narcotic Demo)
Coprofago (Genesis)
Cryptopsy (And Then You'll Beg)
Cynic (Focus)
Darkness Remains (To Touch the Depths of Sorrow)
Deadborn (Decades of Decapitation Demo)
Death (Individual Thought Patterns, The Sound of Perseverance)
Decapitated (Nihility, Winds of Creation)
Deeds of Flesh (Inbreeding the Anthropophagi)
Demilich (Nespithe)
Detachment (Suspended in Stone)
Dim Mak (Enter the Dragon)
Dissonance (Look to Forget)
Dive In Minds (Innocent Victims)
Domination through Impurity (Essence of Brutality)
Dungortheb (Intended To...)
Ebony Lake (On the Eve of the Grimly Inventive)
Element (Aeons Past)
Embrionic Death (Stream of Solidarity... Demo)
Ephel Duath (Phormula, The Painter's Palette)
Epoch of Unlight (What Will Be Has Been)
Esicastic (Atman Demo)
Exivious (Demo)
The Faceless (Akeldama)
Forlorn Legacy (Paths of Insanity)
Gnostic (Isolate Gravity Demo)
Gorod/Gorgasm [France] (Neurotripsicks, Leading Vision)
Gory Blister (Skymorphosis, Art Bleeds, Cognitive Sinergy EP)
Hectic Patterns (The Grand Hare Order Demo)
Illogicist (Polymorphism of Death Demo, Dissonant Perspectives Demo, Subjected, The Insight Eye)
Infernal Poetry (Beholding the Unpure)
Ingenium (2nd Sun in the Eclipse)
Kenos (Intersection)
Korum (Son of the Breed, No Dominion)
Lemorth (Hold the Balance of Power Demo)
Lethargy (Anthology - all releases)
Liers in Wait (Spiritually Uncontrolled Art)
Martyr (Hopeless Hopes, Warp Zone, Feeding the Abscess)
Mutant (The Aeonic Majesty)
Necrophagist (Onset of Putrefaction, Epitaph)
Neglected Fields (Synthinity, Mephisto Lettonica, Splenetic)
Ninth Level (s/t)
Nocturnus (The Key)
Odious Mortem (Cryptic Implosion)
Pavor (Furioso)
Pessimist (Ke Hvezdam)
Pitbulls in the Nursery (Lunatic)
Polluted Inheritance (Betrayed, Into Darkness)
Prejudice (Dominion of Chaos, Reality)
Psychotogen (The Calculus of Evil)
Psycroptic (The Scepter of the Ancients, Symbols of Failure)
Psypheria (Embrace the Mutation, Gothic Disturbance)
Quo Vadis (Day into Night, Defiant Imagination)
Sadist (s/t)
Sceptic (Pathetic Being, Blind Existence)
Scholomance (The Immortality Murder, A Treatise on Love)
Scrambled Defuncts (Hackled in Gore)
Serdce (Cyberly)
The Shattering (The Shattering Begins)
Sinners Bleed (From Womb to Tomb)
Sleep Terror (Probing Tranquility)
Spawn of Possession (Cabinet, Noctambulant)
Stigmatized (Threshold of Dead EP)
Strangulation (Between Nothing and Eternity)
Surgical Dissection (Disgust)
Symbyosis (Crisis, On the Wings of Phoenix)
Terminal Function (Time Bending Patterns Version 1.0 Demo, Time Bending Patterns Demo, The Brainshaped Mind Demo)
Theory in Practice (The Armageddon Theories, Third Eye Function, Colonizing the Sun)
Thrawn (Light Creates Shadows Demo)
Thy Nature (s/t EP)
Trepalium (Alchemik Clockwork of Disorder)
Ulcerate (Of Fracture and Failure)
The Unchallenged (Sceneries)
Unexpect (In a Flesh Aquarium)
Unreal Overflows (Architecture of Incomprehension)
Visceral Bleeding (Absorbing the Disarray)
Vivid X - V. Xtremal Progress
Vortex (Colours out from the Emptiness)
Warchitect (A Sea of Red, Mind)
Winter Bestowed (Within My Labyrinthine Heart EP)
TECHNICAL/PROGRESSIVE/COMPLEX THRASH
Altered Aeon (Dispiritism)
Aydra (Icon of Sin, Hyperlogical Non-sense)
Believer (Sanity Obscure, Dimensions)
Coroner (No More Color, Punishment for Decadence, R.I.P.)
Deathrow (Deception Ignored)
Droys (And If...)
Dyoxen (First among Equals)
Extol (Synergy)
Hypnotheticall (In Need of a God?, Thorns)
Protest the Hero (Kezia)
Sieges Even (Life Cycle)
Skeptic Sense (Presence of Mind)
The Unchallenged (Sceneries)
TECHNICAL/PROGRESSIVE/COMPLEX METALCORE/NOISECORE
Between the Buried and Me (Alaska)
Into the Moat (Means by which the End Is Justified EP)
Ion Dissonance (Breathing Is Irrelevant)
The Number 12 Looks Like You (Mongrel)
Protest the Hero (Kezia)
Psyopus (Our Puzzling Encounters Considered)
Sikth (The Trees Are Dead & Dried Out, Wait For Something Wild)
What's He Building in There? (s/t)
TECHNICAL/PROGRESSIVE/COMPLEX DEATH, THRASH FAVORITES
FIRST TIER
Atheist (Unquestionable Presence)
Aydra (Icon of Sin)
Believer (Sanity Obscure)
Coroner (No More Color, Punishment for Decadence)
Cynic (Focus)
Death (Individual Thought Patterns, The Sound of Perseverance)
Deathrow (Deception Ignored)
Decapitated (Nihility)
Dream Theater (When Dream and Day Unite)
Esicastic (Atman Demo)
Extol (Synergy)
Gory Blister (Art Bleeds, Cognitive Sinergy EP)
Martyr (Warp Zone)
Necrophagist (Onset of Putrefaction, Epitaph)
Odious Mortem (Cryptic Implosion)
Protest the Hero (Kezia)
Psycroptic (The Scepter of the Ancients, Symbols of Failure)
Psypheria (Embrace the Mutation, Gothic Disturbance)
Quo Vadis (Day into Night)
Sceptic (Pathetic Being, Blind Existence)
Scholomance (The Immortality Murder)
Sieges Even (Life Cycle)
Sinners Bleed (From Womb to Tomb)
Spawn of Possession (Cabinet, Noctambulant)
Spooge (Demos)
Theory in Practice (The Armageddon Theories)
The Unchallenged (Sceneries)
Unexpect (In a Flesh Aquarium)
SECOND TIER
Acid Death (Random's Manifest)
Alarum (Promo 2002)
Aletheian (Dying Vine)
Algophobia (s/t)
Altered Aeon (Dispiritism)
Atheist (Elements)
Carcariass (Killing Process)
Death (Human)
Decapitated (Winds of Creation)
Dissonance (Look to Forget)
Dyoxen (First among Equals)
Embrionic Death (Stream of Solidarity... Demo)
Forces at Work (Reverse Feng-Shui Audio Guide EP)
Forlorn Legacy (Paths of Insanity)
Gorod (Leading Vision)
Hypnotheticall (In Need of a God?, Thorns)
Infernal Poetry (Beholding the Unpure)
Korum (Son of the Breed, No Dominion)
Lemorth (Hold the Balance of Power Demo)
Martyr (Feeding the Abscess)
Neglected Fields (Synthinity, Mephisto Lettonica)
Polluted Inheritance (Betrayed)
Terminal Function (Time Bending Patterns Version 1.0 Demo)
Theory in Practice (Third Eye Function)
Thy Nature (s/t EP)
Vortex (Colours out from the Emptiness)
Winter Bestowed (Within My Labyrinthine Heart EP)