Alright so for the elites collage I think ogryns are elites.
I managed to get a slouch hat STL for a Blain from Predator inspired ogryn.
Can't really resize the slouch hat to properly wrap around his head, but it didn't need any resizing to fit. I can probably awkwardly put greenstuff underneath the head and then prime and paint the underside and it will look like it fits snugly on Blaingryn's head.