Warhammer: Age of Sigmar
Another tabletop game by Games Workshop, this one is set closer to a D&D type of landscape. Rather than chainswords and bolters, this game is more bows and swords.
Stormcast Eternals - The ‘poster boys’ of AoS, these, like the Space Marines in 40K, are generally considered the good guys, but that’s subjective. I’ve created something of a custom history around my Stormcast Eternals army calling them the Obsidian Hammers, which is why their weapons are black rather than the standard steel coloring.
Maggotkin of Nurgle - As with the Nurgle army in Warhammer 40K, this is an army built around plague, pestilence, disease, rot, etc. They are designed to be disgusting, covered in slime, poxes (or zits, as my brother calls them), rotting flesh, and just general grossness.