Wasps. You can kill the mosquitoes with tricks atleast, wear essential oils or lotions, use those fly killer lights.
I do not like honeybees or bumblebees for their sting, but atleast they are docile if unharmed and careful, and even great for nature and pollination. I do not hate them like I hate wasps/hornets.
Oooh that one is rough, especially since you just said generic "wasp". That would get rid of a monumental amount of pollinators, specialist ones. And scavengers and predators that help manage other pests. And a large number of wasps are smaller and don't sting, instead they have ovipositors. I won't get into detail what they do with em, but they are harmless to humans and often amazing at taking out populations of agricultural pests, like hornworms
The stingers, the large hornets that can kill with sting, I mean those ones. Most people know what wasp means in context of post, and the menace they are.
I know you meant the ones that you don't want to get stung by, but even those don't exist to sting you, they are important predators and scavengers of their environments, and their loss would still have negative effects.
Plus, the context of the post is discussing the possible negative impacts of if certain animals just disappear, so I used your phrasing as an excuse to talk about something I think is interesting. I mean, without wasps, you don't have figs anymore, at all, and all sorts of other stuff. I think that is neat.