You’re right SilentEnigma, it was Dark Victory
. But unfortunately he was murdered by the Hangman Killer.
O'Hara appeared in a number of comics in the 1970s too, including the Steve Englehart/Marshall Rogers Strange Apparitions
And he made a brief appearance last year in Batman
I’d be interested to know if he was inspired by the Disney character, and if the makers of the TV show ever confirmed this.