Thanks for the comments. Somebody steered me toward that one, and I figured, why not. The 1975 reprint cover actually has "The Masque of the Black Death" as a blurb. Hmm. Meanwhile, editor Len Wein managed to BLOW the ending of the story-- right there on the cover. It takes a certain kind of incompetence to do that!
I've noticed in recent years that many comics artists based characters on real people. The thing is, with "cartoony" styles (Kirby, Ditko, Heck, etc.) this may not always be so obvious. Plus, when you have multiple artists doing the same characters over the years, and fans generations removed, most poeple wind up unaware of the "models".
While Kirby often used then-current actors, I've noticed Ditko had a liking for those 20 years earlier. (Like Ronald Colman as Dr. Strange.)