Growling, can I say Lemmy led the way to growling vocals ??
Venom took the growling a step up and in 1983-84 alot off the well
known bands like Slayer, Possessed, Death, Sodom, Celtic Frost, Voivod etc... provided a base for later Death music. I guess punk/hardcore was also a great deal blended in in the first "growling" bands..
As for growl/scream bands (I assume you mean kinda COF like noise)
I can recall Living Death from Germany having one of the first albums
in that style. Played that album once or so, don't like it to say at least...