Live-Action:
* Frank Gorshin: The iconic portrayal of the Riddler in the classic 1960s "Batman" television series.
* John Astin: Replaced Gorshin for a few episodes of the "Batman" show.
* Jim Carrey: Played a more comedic, almost manic version of the Riddler in the 1995 film "Batman Forever."
* Cory Michael Smith: Depicted a more menacing and psychologically disturbed version of the Riddler in the 2014 film "Gotham," which is a prequel to the Batman mythos.
* Paul Dano: Played a more sinister and methodical version of the Riddler in the 2022 film "The Batman."
Animation:
* Roddy McDowall: Voiced the Riddler in the "Batman: The Animated Series."
* John Glover: Provided the voice for the Riddler in "Batman: The Animated Series" and in several other animated projects.
* Wally Wingert: Voiced the Riddler in numerous animated series and films, including "Batman Beyond," "The Batman," and "Justice League: Crisis on Two Earths."
* Jim Ward: Voiced the Riddler in "Batman: The Brave and the Bold."
* Travis Willingham: Voiced the Riddler in the video game "Batman: Arkham City."
* Conrad Vernon: Voiced the Riddler in the animated film "Batman vs. Robin."
Other Media:
* William Schallert: Played the Riddler in the 1966 "Batman" movie.
* Lou Albano: Played the Riddler in "Batman: The Movie" (1966).
* John Heard: Played the Riddler in the 1989 film "Batman."
This is not an exhaustive list, as the Riddler has appeared in numerous television shows, films, animated series, video games, and other media.