Realistic Book Illustration

I’m looking for a skilled illustrator to create realistic illustrations for my book, which is targeted to an adult audience primarily. The setting is medieval high fantasy (very, very low magic). I have a specific idea I want for the cover letter. It is from a drop down, aerial view of a knight lying on a cart being pulled up a hill into a castle's portcullis. His helmet is off. Along his neck is purple discoloration, almost like he was strangled. There are some other details I want to be seen.

The illustration will be the on the cover of my book called Sworn to Serve.

If you excel at historically inspired artwork, I’d love to collaborate with you!