Lyxen
Great Old One
Give them a relevant magical power then, as has been suggested by others.
Still not answering the question, then ? Honestly, at this stage, it suggests an extremely biased view about Tasha that prevents you from answer honestly so, again: "don't you think that being a goliath compared to a halfling, just purely physical differences of size and strength, could not drastically change the culture(s) that you develop as a species?"
Loss? I offered no decision on whether I would enjoy it now or not. Griffin Mountain was, and perhaps still is, one of the two best designed modules for any game system. (The other is Masks of Nyarlathotep, for CoC, also Chaosium.) From memory, the Balazarings are respectfully treated (and nicely contrasted with the Lunar Empire!) With trolls, the matriarchy stepped away from lazy traditions of the fantasy genre.
Oh, yes, that is indeed that it's important in a game, right, of course. That is certainly what made a great module for you at the time, thinking how politically correct it would be 40 years later with different standards...
What made these peoples interesting wasn't 'genetic' assumptions about player character ability scores.
Alors, first, for me, Griffin Mountain is really not the most interesting campaign of even RQ2, certainly not compared to Pavis/Big Rubble or Borderlands. But even then, the differences with the dragonewts and Uz are certainly a lot about the stats, technically, and when you go visit a giant, sure, stats are not important...
What made it great, though, for me at least, were all these cultures, Uz, Broos, all the types of Balazarings, Lunars, dwarves, dragonewts, were firmly based on everything that they actually were, stats, magics and personalities.