All iPhones in the house are connected to our wifi but nothing will actually load on them. I've tried resetting, changing the DNS, unplugging the wifi itself; you name it. The wifi works on everything else, including my MacBook Air.

ive had the exact same problem, and the only way i solved it was by restoring to a backup that still had 9.0. However, my phone specifically showed that 9.1 was the reason it had network connectivity issues, and I'm not sure if it would work for you; it's worth a try. Unluckily, my phone somehow upgraded to 9.1 again, and i cant restore the backup as it requires me to turn off find my iphone, which i cant do without network on the phone. I'm also open to suggestions if anybody may have some.