So what does The Doctor actually look like?

[PLEASE NOTE THAT I HAVENT FINISHED CHAPTER 4 YET!]

I'm hoping to do a cosplay of him, so I need an actual image of what he looks like, but I can't seem to find one. Every version I find looks different . There's the one in the trailer, and then there's all the other art, and I cannot find what he actually looks like for the life of me. Please help me out!