I really don’t want to use an Arch based system. I’m worried about stability and security issues.

If you keep it simple, it will not be an issue. I think cachyOS does it really good. That being said. Go with bazzite. It will give you the best Out of the Box experience. For me Debian based systems lack far too behind in feature updates for it be a viable Desktop OS (Don’t at me. It is my personal opinion lol). I remember waiting for a year for KeepassXC’s passkey update which made me switch to Fedora on my office laptop from pure Debian. Of course I could have used flatpak but it then didn’t integrate well with the browsers. Fedora and its derivatives are the perfect middle ground for your use.