Detective Comics (vol. 1) #331 (Sep. 1964):
“Museum of Mixed-Up Men!”
by Gardner F. Fox, Carmine Infantino, Joe Giella

Detective Comics (vol. 1) #331

Title: “Museum of Mixed-Up Men!”

Medium: comic

Cover date: Sep. 1964

Publisher: DC
Written by: Gardner F. Fox
Art by: Carmine Infantino, Joe Giella

14 characters in this story:

(Click links for info about character
and his/her religious practice, affiliation, etc.)
Pub. #
Batman Batman (Bruce Wayne) hero
CBR Scale: ICBR Scale: S Episcopalian / Catholic (lapsed); atheist
Batman family; Quinntets...  DC 11,112
Nightwing Robin (Dick Grayson) hero
CBR Scale: I Christian (denomination unknown); raised Gypsy/Roma
Batman family; Super Friends...  DC 4,498
Elongated Man Elongated Man (Ralph Dibny) hero
CBR Scale: S ghost
Croatoans; The Doom Patrol...  DC 522
Sue Dibny Sue Dibny supporting character
CBR Scale: S ghost
Super Buddies; The Justice League (administrator)
[wife of Elongated Man]
DC 124
"Boss" Barron villain
  [used electrofaciograph to steal identities of rich men] DC 1
David Moore
(9-panel cameo)
supporting character
CBR Scale: S religious/ethical
[Bruce Wayne's banker] DC 2
Crawford Lurie
(5-panel cameo)
supporting character
 indeterminate  [weathy victim of identity theft] DC 1
Aunt Harriet Aunt Harriet
(3-panel cameo)
supporting character
  [aunt of Dick Grayson (Robin); replaced Alfred] DC 89
Commissioner Gordon Commissioner Gordon
(1-panel cameo)
supporting character
CBR Scale: U Protestant
GCPD; The Mystery Analysts of Gotham City DC 2,797
George Washington George Washington
real/historical person
CBR Scale: S Anglican / Episcopalian
[farmer; general...] DC Marvel 204
Matthew Brady Matthew Brady
real/historical person
  [first great American photographer] DC 1
Alfred Pennyworth Alfred Pennyworth
supporting character
CBR Scale: I Anglican
[butler] DC 3,048
Gladys Moore
supporting character
 indeterminate  [wife of Bruce Wayne's banker David] DC 1
supporting character
 indeterminate  [Gotham City shop owner] DC 1

The table of contents in the Showcase Presents: Batman volume 1 collection lists the author of "Museum of Mexed-Up Men!" as John Broome. This appears to be an error. Most sources agree the author of this story was Gardner Fox.