Around here, we have two or three kinds of hornets. The first kind was native to North America to begin with. Then they imported a similar type from Europe to "control" the native type. Then, I guess it's been 25-30yrs since I started seeing these big yellow/black African hornets they brought in to control the European hornets. I read somewhere that, with the black and baldface hornets, most problems occur when they nest too close to humans.
Those baldface hornets... several years back, we were sitting on the porch and swatting flies. Well, every time we'd put a dead fly up on the banister, this one hornet would fly in and carry it off... I guess they ordered take-out.
I only recall one guy getting stung by one African hornet. The only reason I know is Daddy said he saw it happen to a co-worker. They said it hurt too. I always figured an African hornet for a hunter... never saw one just up and attack.
We have the mud daubers here too. They'll fill up any threaded hole you need open... any vent you need open... kinda funny in a way, because otherwise, they ain't hurtin a thing. I figure they're the ones I've seen a lot of times buzzing around horse manure. There's an outfit that sells wasp larvae to be added to a stable's main manure pile. I've never done that, but my horses have never stayed in stalls that long, and like I say, the wasps are already here.
That little black wasp that kills tomato worms... I'll have to ask around, but I'm not aware of them here.
Yellow jackets... I'll have to look into trapping the queens. I've had them build a paper nest between two hay bales and we were lucky nobody got stung. Best thing I ever saw happen naturally to a yellow jacket nest was the time I watched a skunk tear it up.
Well, no tarantula hawks around here. No tarantulas either. I'll have to poke around some, but I don't recall black widow or brown recluse having natural predators.