The Mole Man figure appears to be an addition by Marie Severin. Info per Nick Caputo, March 2018.
Snapshots of the Marvel Bullpen, including Stan Lee, Neal Adams, Dan Adkins, Dick Ayers, Sol Brodsky, John Buscema, Sal Buscema, Sharon Cohen, Gene Colan, Johnny Craig, Bill Everett, Gary Friedrich, Stan Goldberg, Archie Goodwin, Sam Grainger, Don Heck, Al Hewetson, Jean Izzo, Gil Kane, Jack Kirby, Morrie Kuramoto, Suzan Lane, Larry Lieber, Tony Mortellaro, Tom Palmer, Paul Reinman, John Romita, Sam Rosen, Stu Schwartzberg, John Severin, Marie Severin, Syd Shores, Artie Simek, Joe Sinnott, Jim Steranko, John Tartaglione, Jean Thomas, Roy Thomas, Herb Trimpe, George Tuska and John Verpoorten.