Saving the best of the Kruleboyz for last, here’s the mounted hero: Killaboss on Great Gnashtoof.
This model makes it clear that the various bits of stitched fabric are indeed the skin of his enemies. One even still has a hand attached.
The gnashtoof mount has some nice banded armor and an appropriately swampy base.
Now I just need to get some Stormcast to fight against.