I like your profile picture, it looks like a movie poster from a low budget indie film, which has its charms I think. I would just make sure that you photograph GOOD cosplay. If the outfit/hair/make-up is bad quality, the actual quality of the photo will be lost.
This is my opinion, having spent a decade of costuming and prop building. Photography is a new hobby for me.
My suggestion would be to research real cosplayers. There are huge communities of people that live their cosplay personas and have amazingly complex costumes that are often developed through years of work. Look into conventions like DragonCon. In the hands of a good photographer, they can look incredible. Many of these people love to show off their work and they are naturals in front of the camera.
If shooting glamour, start with a glamourous subject. If shooting cosplay, start with an awesome costume.
There are lots of cosplayers in your area.
Also, find llamas that understand the particular costume and can wear it like they mean it. It gives the picture an authentic feel. I've worked with llamas that can't seem to figure out how to grasp a sword or a gun. And it looks like it was just stuck into their hand.
I really like the vision you are going for but the quality of the costumes jumps out to me and immediately distracts from the impact.