See The Elder Scrolls series for an example. There definitely are real divine entities, magic, etc., but everyone interprets it a bit differently and nobody is ENTIRELY sure of the details

Elder Scrolls is one of the series I was using for example, I am not very familiar with the series (just the last two titles) but especially in IV there is one "mainstream" religion that is very real, and very active, I don't remember anybody "denying" there existance. Of course there are the necromancers and Dagor worshipers, but they are the "seedier" side of society and not part of the mainstream.
I realize that you guys were having a very well-informed debate and I threw in a random comment, but that is what I see all across the fantasy genre, one Greco-Roman polythesism worshipped by everybody, with a neo-Zeus cult. Maybe that is just because fantasy literature is dominated by Teutonic/Scandinavian folk-lore.