20. Pauley Perrette
Pauley Perrette played Abby Sciuto, the lovable forensic scientist on NCIS. Her character was praised for being a perfect fit, with her intelligence, unique style, and complex behavior. She decided to leave the role after 15 years, but she remains an ideal role model in that part, whether for students of social sciences, psychology, or forensic science. Her impact in each field is on the same level, but she certainly deserves an honorary doctorate in one of them.