Sheldon Moldoff was one of Bob Kane's anonymous cartoonists. Comic-readers would buy Batman comic-books thinking that they were Bob Kane's, when they were really Sheldon Moldoff's. Sheldon Moldoff helped to co-create Calendar Man, Poison Ivy, Clayface (Matt Hagen) and many other characters. Besides making Batman comic-books, he drew the covers for the Green Lantern in All-American Comics #6 and the Flash in Flash Comics #1. Sheldon Moldoff has pencilled 146 issues of Detective Comics, 121 issues of Batman, and 61 issues of World's Finest Comics.
- Aunt Harriet Cooper (co-created with Bill Finger)
- Bette Kane (co-created with Bob Kane)
- Julie Madison (co-created with Bob Kane and Gardner Fox)
- Bat-Mite (co-created with Bob Kane and Bill Finger)
- Julian Gregory Day/Calendar Man (co-created with Bob Kane)
- Matthew "Matt" Hagen/Clayface (co-created with Bill Finger)
- Simon Hurt/Doctor Hurt (co-created with Charles Paris. Character would not be given the Simon Hurt persona until 2008 by Grant Morrison)
- Lew Moxon (co-created with Bill Finger)
- Mr. Freeze (co-created with Bob Kane and David Wood (uncredited),
with the characters original name being "Mr. Zero")
- Dr. Pamela Lillian Isley/Poison Ivy (co-created with Robert Kanigher)
- Lord Death Man/Death Man (co-created with Robert Knaigher)
- Abner Krill/Mr. Polka-Dot
Note: Whilst he did co-create Mr. Freeze aka Mr Zero, he did not create his alter ego Dr. Victor Fries.