Bayonetta lol. Seriously though, she does damage in combos like from a Bowser grab, and has tools to keep the opponent out of your face and basically moves like ZSS. Yeah she has some lag, but you play Bowser so that's nothing. You might have to get used to how you get kills with her though. Plus she's all about baiting and punishing and confirms into combos, so it's a good fit in my opinion. Just look at Le Troof.
Also, in my opinion, she's going to get nerfed so I'm waiting on that.
Otherwise, I personally play Falcon against zoning characters, in more or less the same rush-down fashion I would play with Bowser except faster. Dash grab, to ferris wheel of up-airs. Can also kill early with hard reads with knee. Very satisfying.
Alternatively, if you can't beat them, join them! I think Villager is probably the best zoning character in the game. Good for just getting to understand how a player who plays projectile users thinks, and gettting good at the item game in general. Fun mindgames also.
I play a little mac specifically for the Ryu matchup. Smaller body, better frame data, multi-hits, and you can down smash that Shoryouken recovery like a boss. Has some crazy movement tech, if you're into that.
I'm trying to learn Rosalina because the whole "wall of hitboxes" philosophy is familiar to me as a Bowser main, and you can do some cheeky Luma desync stuff.
Other than that, I find Zard to more very similar to Bowser, I'm kind of excited to see any good Zard players come up.