Realistic Illustrator Design

I'm looking for a skilled illustrator to create a realistic design featuring people. This illustration will be used for marketing material, a book cover, and/or a website graphic.

Ideal skills and experience:
- Expertise in realistic illustration
- Experience in creating designs for various purposes: marketing, book covers, website graphics
- Ability to depict people accurately and artistically
- Strong portfolio showcasing similar work

Please provide samples of previous realistic illustrations, especially those involving people.