Riddick didn't start as a comic book. It might have been inspired by various sources, but not from comics initially. Maybe it came from a movie concept or a novel idea.
The Chronicles of Riddick is not a comic book. It's more recognized for its cinematic adventures rather than having a comic book counterpart. Although sometimes properties expand into different mediums, in this case, the main focus has been on the films.
The story behind Riddick involves his struggle for survival and his unique skills that help him overcome numerous obstacles. He has a history of being on the run and getting into intense conflicts.
A creative plot could be where Hermione uses her magic to help Riddick control his 'Furyan' side better. For example, in some fanfics, she creates spells that can soothe his inner rage. This is interesting because it combines the magic system from Harry Potter with the unique biological aspect of Riddick.
One common theme is the clash of different worlds. Naruto comes from a world full of ninjas and chakra, while Riddick is from a more gritty, sci - fi universe. So the cultural and environmental differences are often explored.
Yes, there are quite a few out there. You can start by checking popular fanfiction websites like Archive of Our Own. Just search for 'harry is riddick's mate' in the search bar, and you'll likely find some interesting stories.