All VPNs are run WireGuard under the hood. Proton isn’t adding any special sauce to the mix. But they do have a large IP pool that I trust they are rotating frequently enough. After that its really a simple matter of pricing and how you like their UI.

My search led me to Mullvad or Proton. Proton was running a Black Friday sale so I went with them. I’ve had no problem running Proton on Fedora Silverblue, Fedora Workstation, Debian, or Android.

mullvad is better as they support all the protocol on linux unlike proton