Can anybody help?

[Behemoth24]

I have been on an Old School Death Metal kick as of late. Can anyone recommend me some of the lesser known Old School bands?

I am currently into:

Morbid Angel, Obituary, Suffocation, Hellwitch, Malevolent Creation. The are more but I think you get the idea.

 

[Unfaithfully Metalhead]

Death, Deicide, Cannibal Corpse? You may like Bloodbath as well though they were not from that era.

 

[Wyvern]

Cancer, Disincarnate, early Entombed, Dismember, Carcass (second period), Possessed, Gorefest

 

[HamburgerBoy]

Afflicted - Prodigal Sun
Atrocity - Hallucinations, Todessehnsucht
Ripping Corpse - Dreaming With the Dead
Sadist - Above the Light (and Tribe, if you want some keyboard-laden Atheist worship)

 

[TheKorruptor]

Bands you probably already listen to (but if you don't - you should):
Pungent Stench, Benediction, Bolt Thrower, Autopsy, Asphyx, Pestilence, Cryptopsy, Massacre, Massacra, Incantation, Grave, Vader, Merciless, Monstrosity, Nocturnus, Master, Necrophobic, Rigor Mortis, Nihilist (Swe) [it's basically Entombed.. but still worth checking out.. and awesome]

Lesser known bands:
Demilich, Carnage, Cadaver, The Chasm, Shub Niggurath, Oppressor, Pentagram (Chile), Morpheus Descends, Baphomet, Liers in Wait, Leukemia, Morgoth, Sorrow (US), Xysma

Modern/Contemporary bands with an old school sound:
Death Breath, Thorazine and Visceral Bleeding (for fans of Suffocation, Cryptopsy), Butcher ABC (awesomely heavy death/grind in the style of early Carcass)

..and of course all the other suggestions which are all awesome!