If they're short hopping too much, try and catch their landing with HS. Most of the characters you appear to be talking about are combo food, make the most of your punishes and try to find gaps in their defenses. Try and find out how they approach, and punish predictable hitboxes with Witch Time. HS can also whiff punish attacks that are normally safe on shield, such as Greninja's fair or ftilt. Make it scary to contest you in the air, and if you really need, put the pressure on and find when they drop shield or shield too much. Given that you're bayo, you can probably outspace them. We can hard outspace someone like Fox or Sheik with our long limbs, and once they have to get in they're susceptible to whiffing altogether, which leads to other punishes. That's all I can really say, feel free to ask more questions if you have them.