Kevin Leiss is a freelance digital artist who makes beautiful monsters. (Among other lovely creations.)
You can find his work at https://kevinleiss.com/
Artist Matthew Regalado is an artist who works in a variety of mediums and specializes in cyborgs, aliens, and sci-fi worlds.
You can find him at https://www.artstation.com/matthewregalado
Chloe Gross works in pencil and in digital, makes beautiful concept art upon request, and we authors are going to stalk her until she puts up an Artstation page… stay tuned 😉
Sam Muraski was so kind when Stolen by an Alien came out. Her covers are gorgeous and you can find her work at https://asketchbookthing.tumblr.com/