Crimson Longinus
Legend
So 'most orcs are evil savages, but there are some good ones' is fine by you? (It is not fine by me.)No.
There is no essence.
In the example of the Goliath. Many Goliath exhibit an ability score improvement to Strength. But some dont.
There is no essence.
There are individuals who are quite different.
Or lets try this in the real world. 'Most Asians are good at math.' Yep, still essentialist, still racist. (And I'm sure you can easily imagine even more offensive variations.)
Also, you conveniently omitted the other biological features I mentioned.