Looking For Rig for GFX

I’ve been seeing a lot of cool GFXs recently and I wanted to start making them. But I have no idea what the best rig is for blender GFXs and where to get it. Please tell me how to get a good GFX rig.

Why would you like an R15 rig? You can just export characters as R6. I am unaware of any R15 rigs as of now.

I guess you can get starter rig from softy, it quite useful