there's only one that's not extremely shady and has working port forwarding. If you don't need the latter, just stick to Mullvad.
I was happy with Mullvad for a long time, especially being able to buy their scratch cards, but now I had to move to Proton due to the deprecation of port forwarding and openvpn at mullvad.
But PIA is american anyway so that won't work for me, I'm not signing up with new american services anymore since Trump came to power again.