After playing around with stages, Fountain of Dreams has proved to be an excellent alternative if said 3 stages were banned. Namely, for the relatively small horizontal blast zones and the cramped stage size. However, the lack of reliable platforms that are consistently there inhibit Bowser's platform movement, which he really needs.
I agree with Odds_ and will generally avoid flat, wide stages because it's easy to get overwhelmed by good dash dance game. Small stages help with not getting grabbed into oblivion (with Bowser at least). The fear of the 50% stage covering ledge attack also makes me more inclined to go to small stages.
In my personal opinion, I actually like Norfair purely for the lack of stage knowledge (and because it looks like you're fighting inside Bowser's castle ^^). Norfair has surprisingly larger than normal blast zones that allow Bowser to live longer than he normally does. The platforms give him a better neutral game but since they're kind of high up relative to the base of the stage, it leaves you vulnerable to punishes if you get caught on the way down. There is also a lack of down b to ledge if the platforms transition into blocking the ledge, but due to lack of some stage knowledge I can take some games off of people.
After considering multiple opinions, Battlefield seems to be the best neutral stage for Bowser. Both vertical and horizontal blast zones are somewhat small, like Odds_ said, the 3 platform format greatly improves Bowser's options and movement, perfect wavelands seem to be easier on BF than some other stages, and down b to ledge isn't interrupted by platforms like they are on other stages.