But I did some digging into Kagi, the makers of Orion and was turned off by them being an AI search company.
It is optional. Unlike most other search engines, it only pulls an AI summary if you explicitly request it. They're not trying to push it at all. But they'd be dumb to just ignore it completely.
despite Kagi claiming Orion completely blocks fingerprinting I couldn't get Orion to pass EFF's fingerprinting benchmark tool
Fingerprinting is simply more complicated than pass/fail. Does your other browser(s) pass? Check out deviceinfo.me, look at the info there and have a good think about how much of it is specific to you. Also Safari is notoriously fingerprint-resistant and Orion is a fork.
There really aren't any "great" options for browsers. It's a very resource-intensive process that costs a lot of money without a lot of great ways to get that money back.
Mullvad browser is a good one, funded by their optional VPN service. It's basically TOR browser without TOR network. I find it to be too restrictive though.
Zen and Floorp are other good Firefox fork alternatives. One of those would be my recommendation if you don't like Brave or Orion.