I'm sort of playing Devil's advocate here, but something like Liturgical Drama makes sense to me, in principle. It's not really a follower belief optimized to be good for you exactly. It's more like a "delta" belief, I guess? It's a belief for when you don't want to give those bastard enemy civs any advantage. A follower belief that gives faith is relatively "safe," but is still useful for you if you're going wide and want to snuff out all competing religions. That's not a bad thing to do, if your focus is on denying an AI any good bonuses, while you maximize the bonus you're getting for your Founder belief. Take Unity of the Prophets or something to push your religion hard. Something like Peace Gardens or Monasteries are also good if you can optimize yourself to take advantage of them, but they're obviously more niche. In any case, this typically has the added benefit of likely being easy to pull off even if you're picking last.
Anyway, I think it could still use a boost. Maybe +1 Faith for each Great Work of Writing slot you have? Give +X Faith for the National Epic?