I think that the best of the American Death Metal scene easily stands it own against any other scene, tbh. I mean, you have all these:
Possessed - Seven Churches
Morbid Angel - Abominations Of Desolation
Morbid Angel - Altars Of Madness
Morbid Angel - Blessed Are The Sick
Nocturnus - The Key (not to mention the demos)
Incantation - Onward To Golgotha
Incantation - Mortal Throne Of Nazarene
Immolation - Dawn Of Possession
Autopsy - Severed Survival
Autopsy - Mental Funeral
Obituary - Slowly We Rot
Obituary - Cause Of Death
Hellwitch - Syzygial Miscreancy
Brutality - Screams Of Anguish
Brutality - When The Sky Turns Black
Death - Scream Bloody Gore
Death - Leprosy
Death Strike - Fuckin' Death
Insanity - Death After Death (+ demos)
Morpheus Descends - Ritual Of Infinity
Massacre - From Beyond (demos even better)
Rigor Mortis - Rigor Mortis
Nunslaugter - lots of stuff
Atheist - Piece Of Time
Atheist - Unquestionable Presence
Ripping Corpse - Dreaming With The Dead
Master - Master
Master - On The Seventh Day, God Created
Master - Unreleased 1985 Album
Goatlord - Reflections Of The Solstice
Order From Chaos - Stillbirth Machine
Revenant - Prophecies Of A Dying World
Divine Eve - As The Angels Weep
Crimson Relic - Purgatory's Reign
Baphomet - The Dead Shall Inherit
Banished - Deliver Me Unto Pain
Devastation - Idolatry
Winter - Into Darkness
Winter - Eternal Frost
Sorrow - Forgotten Sunrise
Sorrow - Hatred And Disgust
Deicide - Deicide
Deicide - Legion
Cianide - The Dying Truth
Cianide - A Descent Into Hell
Cianide - Death, Doom, And Destruction
Rottrevore - Iniquitous
Malevolent Creation - The Ten Commandments
Malevolent Creation - Retribution
Monstrosity - Imperial Doom
Resurrection - Embalmed Existence
Absu - Barathrum: V.I.T.R.I.O.L.
Afterlife - Surreality
Infester - To The Depths, In Degradation
Ceremonium - Into The Autumn Shade
Ceremonium - No Longer Silent
Dusk - Dusk
Plus these (mostly demo bands):
Archenemy, FCDN Tormentor, Funeral Bitch, Savage Death, Terminal Death, Necrovore, Sindrome, Devastation (Chicago), Sadistic Intent, Sathanas, Vacant Grave, Deceased, DVC, Dead Conspiracy, Rotting Corpse, Dr. Shrinker, Diabolic Possession, Blessed Sickness, Infernal Heirarchy, Fatal, Skeletal Earth, Vital Remains, Funeral Nation, Acheron, Incubus, Killing Addiction, Morbius, Morgion, Mythic, Eulogy, Funerus, Imprecation, Magus, Mass Psychosis, Morgue