Up until at least, the Tim Burton movie with Michael Keaton in 1989. And I don't mean a spiritual successor from the standpoint of having a campy, tongue-in-cheek tone or pop art influenced look.

Basically, are there any shows that in a different context, could've easily be interpreted as an adaptation of the Batman comics in general? For example, I read a suggestion that Knight Rider was almost like a Batman show:

Batman wore a mask. So did Michael Knight because he had a face transplant that changed him from Michael Long
Devon in Knight Rider = Alfred in Batman
Knight Corp in Knight Rider = Wayne Corp in Batman
Knight Corp truck = Bat Cave in Batman
Both Batman and Michael Knight have no super powers
Both Batman and Michael cannot fly; but both can glide or raise themselves with technology; Batman uses his cape; Michael uses his car KITT.
Both have a high tech car
Both Batman and Michael fight crime as loners outside of the legal cliques
Batman has Robin as his sidekick; Michael has KITT


Although Glen L. Larson claimed hat Knight Rider was really influenced or inspired by The Lone Ranger (with KITT being Tonto to Michael Knight's Lone Ranger).

Hart to Hart was another show from the '80s that may or may not have a Batman influence. Namely, both Bruce Wayne and Jonathan Hart are suave, rich guys who own a huge empire, but seem to prefer spending most of their time going around fighting crime. Adam West himself, was even in an episode (https://www.imdb.com/title/tt0597253/reference) of Hart to Hart.