2) Lynda Carter
Arrowverse Role: Supergirl as President Olivia Marsden
Other DC Universe Roles: Wonder Woman as Diana Prince/Wonder Woman, Smallville as Moira Sullivan
Few DC TV stars are bigger than Lynda Carter. Thanks to her role as the Maid of Might in the 1975-79 Wonder Woman TV show, she’s a veritable pop culture icon. Naturally, she was welcomed onto Supergirl, then, another TV series led by a DC heroine. Carter is currently turning up now and again as President Marsden, the female POTUS who’s actually an alien in disguise.
She also appeared in an episode of Smallville as the metahuman mother of regular character Chloe Sullivan.