Either make it so that the chaaracteristic monster is a subgroup of a larger culture like what vikings are to nords, or make it so that the creatures are not fully sentient and are artificial in some way.
Do you want to have the raiding villainous goblins? Just claim there are two types of Goblins: the race, which are normal sorts, and the feyborn, goblinoids who appear in specific areas and are primordial creatures of chaos and violence.
If you want to go deep, make some visual distinctions between the gobbos. Maybe they aren't even related at all, but the people correlated the two.
That way you can have your cake and eat it too, and if any sjw complains you can hit them with the "you're making assumptions based on your internalized racism, they're two different things and you just stereotyped them". Fucks them up real good.