Were there any active, widespread, common, public religions in the Star Wars galaxy at the time of the rebel alliance? If so, what were they?
By widespread, I mean religions that span multiple systems, and aren't just tied to one specific world. All of the examples that I'm aware of are either small cults, or specifically tied to individual worlds. By common (and public) I mean that most educated/worldly people in the relevant sector(s) would have heard of the religion.
Note that, by this time, the Jedi are considered to be extinct, and the other explicitly Force based belief systems, including the Sith, are a combination of small-scale and secretive.
If there are so many, that this would turn into a list question, I really only care about the one (or two) most common religions that Outer Rim.