From what I've picked up Samsung devices tend to be pretty high up there, some may even fulfill the security requirements. However, they are downright malicious to 3rd party operating systems so they fall out. Fairphone's security track record is a dumpster fire so they aren't suitable either. As of yet google's pixel line is the only one that supports it all without compromises.
If you want to learn about why Fairphone is terrible security wise, check out this post from the official GrapheneOS account on reddit. It's from january this year, but if anything significant had changed that could have swayed support for their devices you would know already.
Libreddit: https://libreddit.nullnet.services/r/GrapheneOS/comments/10b5x4n/comment/j67pbny/
Reddit: https://www.reddit.com/r/GrapheneOS/comments/10b5x4n/comment/j67pbny/