I recall during hs run on CATWOMAN, Paul Gulacy made Slam Bradley look like Robert Mitchum. Gulacy was having a problem around that time, as there'd been a big stink about certain artists using too-recognizable likenesses of celebrities without authorization / licensing / FEES... so he was trying to do likenesses (as he always did) WITHOUT them being too recognizable. It got awkward at times.
Early in my time at the Classic Comics Forum, the FIRST guy I had to block there kept arguing with every single thing I would post, including when I'd bring up likenesses, insisting LOUDLY "No, YOU'RE WRONG, it's not based on THIS person, it's based on THIS person!!!" It was about Tony Stark. I would hope by now everyone realizes Kirby based the character of Stark on Howard Hughes, who was a rich industrialist with a secret medical problem. But the lead artist who took over after Kirby wrote the first 3 episodes, Don Heck, CLOSELY modelled Stark's face on Errol Flynn. It was painfully obvious, yet this one clown insisted it wasn't Flynn. (This is what happens when people have been brainwashed by decades of S*** L** BS.)
Usuaully, with corporate characters, you have to go back to the original artist who created the characters, and then find real people from that era-- OR, BEFORE. As with Errol Flynn, Steve Ditko would base characters both on then-current peole, but also from decades before. While Dr. Strange initially looked like Vincent Price (this was NOT obvious to me at all until someone else pointed it out), later on he slowly evolved to look more like Ronald Colman. This was interesting, as several other characters in the series all were modelled on actors who'd been in the movie "LOST HORIZON"-- Sam Jaffee (The Ancient One), H.B. Warner (The Ancient One's business manager), and Jane Wyatt (Clea!).
What a laugh when I realized Dr. Strange debuted almost exactly 3 months after the release of Roger Corman's "THE RAVEN". That can't be a coincidence.
It really cracked me up when I realized the sleazy private eye who became The Scorpion was based on Ralph Meeker, who'd played a sleazy private eye in the nasty, viscious film "KISS ME DEADLY". And then there was the day I was watching the 1946 "THE BIG SLEEP" for about the dozenth time... and suddenly, looking at Lauren Bacall, I yelled at the TV-- "Oh my God-- it's GWEN STACY!" (Ditko's Gwen, NOT Romita's.)