Which race would you add to Heroes?

Finally, I decided to write!

I have an idea for a large expansion to the Heroes universe!

Firstly, in my opinion, the new Heroes world should have 3 inhabited layers:
1. The Upper World.
2. The Dungeon.
3. The Demon World.

1. The Upper World - currently inhabited by:
- Humans (let's consider the Middle North - plains and fields)
- Mages (Northeast - desert)
- Elves (in my opinion, the Center - deciduous forest)
- Necromancers (scattered like the tribe of Israel across known lands)
2. The Dungeon.
- Currently brazenly occupied by Dark Elves
3. The Demon World.
- Naturally - Demons aka Krigans, definitely.

Now, let's expand the world!
1. South of the mages' deserts, there are rocky steppes that transition into arid plains, inhabited in the east by Orcs and their allied trolls (in the middle mountains), and in the western part (closer to the south) - Gnolls and Ogres.
Between the elven forests and the steppes lies a great swamp, inhabited by Lizards
The northwest is occupied by the mountains of the Gnomes, and just south of them are the hills of the Satyrs (I would place the legacy of Greek myths of a natural kind there - centaurs, nymphs, and on the last level, a cyclops)
The jungles of the south - Lizardmen.

2. On the outskirts of the Dungeons and in secret passages, the remnants of the forces of chaos are hidden, the main part of which consists of the army of Troglobites with heroes like Troglobites, human spellcasters, and the last uncaptured Minotaurs. They are secretly supported by the Gnomes and the swamp Lizards!

3. In direct contact with the Mages in the Demon World, the "fifth column" fights - Inhabitants of the Raging Fire - efreets, salamanders, and fire spirits.

That's the disposition!!!

In addition, I would add a variety of interesting neutrals - ratmen, intelligent mushrooms, giant intelligent ants and cockroaches.

But then it would no longer be Ashan, but a completely different world...