Renée from The Cover Counts has done several book covers for me. I can honestly state that she’s a very skilled person who takes the time to listen to what you want. Give her the core of your story, tell her what you think should be in the story at the very least and then just let her go and do her magic.
Renée has excellent skills, an eye for detail and composition, and actively thinks along with you to get the best out of your story onto the cover. Remember: you’ll never get a second chance for a first impression, and the cover is that first impression. (books by Paul Kater)