Hooded Hangman

The Hooded Hangman AKA Telman Davies was an enemy of Batman.

Pre-Crisis
Telman Davies was a Gotham City newscaster who lead a double-life as the professional wrestler "The Hooded Hangman" who dressed like a medieval executioner. Despite being a succesful fighter, Telman performed countless illegal fighting moves which made him a figure of controversy. Telman was envious of the Batman as he wanted to become the most popular masked fighter in Gotham so he started to lure the Dark Knight out to crime-scenes so that they could fight.

Telman was good at beating Batman in hand-to-hand combat but Batman outsmarted him by using makeup and prosthetics to look identical to Telman Davies. When Hangman removed Batman's cowl he was so filled with shock at seeing himself that Batman managed to quickly gain the upperhand and remove his mask and reveal his identity as Telman Davies to all of Gotham.

Due to this, Telman lost his job as a newscaster and was forced to flee on a ship to South America.

Batman Manga
In Jiro Kuwata's Batman Manga, Telman is one of the main villains. The main difference in his adaptation here being that at-first he tries to become more beloved by Batman by becoming a brutal vigilante although he clearly has no qualms with killing innocents.

Trivia

 * Sofia Gigante adopted the identity of "The Hangman" in New Earth continuity.