Nice non-canon cannon interlude there...
Goblins!
3 - goblins - there were four or five styles of goblins in this era, which should I use?
4 - goblins again - just try collecting any number of goblins from this era, they are shockingly rare and expensive
Citadel Goblins 1979-1983. It's actually a bit of a mess, with models of different styles being introduced all over, and old models being kept in production alongside them. Even the early C series range is a mess. It's not until 1984, or arguably even the mid 80s and slotta bases, that Citadel actually get all their models ranges into order. Goblins are as good / bad example of this mess as any.
Fiend Factory Goblins c1979
I think these are the earliest. I always think of these as "Eastern" goblins because of their little hats, and because the broken spears once had long naginata-like blades . They are very dapper, orderly looking chaps, as Warhammer goblins go - but these are pre-Warhammer, D&D goblins. I think if they were human sized they'd make great AD&D Hobgobs. The wolf shield motif is nice.
Fantasy Tribes Gnolls / Goblins c1981
Yes kids, these were gnolls until 1982. Nope, I dunno.
I split the picture to show the main variation here, namely the bat-ears on some of the models, which I personally think are great. The small-eared chaps at the top also have a tendency to bushy eyebrows, which honestly makes them look quite gnomish...
Quite alot of this range are mail armoured, and there is a Norman theme to their helmets and even some kite shields (as were prevalent on the Fantasy Tribes Dwarves)
Fiend Factory Orcs / Half-Orcs / Red Goblins c1982
Absolute naming chaos. Looking very little like anything else in the goblin ranges, these were the only Wolf riders you could buy until about 1987 I think! (Gnolls / Great Goblins were all riding Boars at this time). There were some infantry figures in the same style, but don't trouble yourselves with those.
C13 Night Goblins c 1983
These will look more familiar - everyone's favourite robe wearing Night Goblins appear. Of course, at this time, they were bundled in with the "Eastern" style goblins pictured earlier and also some guys who are much more akin to what we now think of as a GW Goblin.
SO THERE YOU HAVE IT - the "what are the correct goblins to use with early Orcs" problem.