ProtonVPN free (paid is still too expensive for me) and Mullvad.
I find that Mullvad is usually blocked more.
For the past 3 or 4 years I was just on ProtonVPN free tier. For past 15 days I am using Mullvad. I really like that you can choose some custom ports for WireGuard, and also the multihop.
What is unfortunate is that I can't generate separate credentials for OpenVPN, like with ProtonVPN. It just uses account ID.
I have also tried IVPN for a week. Nicer UI, but a bit more expensive, sort of. They have variable pricing based on subscription length, and that just makes me dislike them enough to stick with Mullvad. €5/month whether it's 1 month, 6 months, a year or longer.
I don't remember what specifically it was, but I know I also preferred the Mullvad's ToS over IVPN, although both are fine.
I also thought of AirVPN because of port forwarding, but for privacy I'll stick to Mullvad.
What surprised me with Mullvad was the payment processing speed. It only took 4 days from me dropping the envelope with money into mail collection box in Slovakia to me getting the time added. Considering that shipping to Sweden is "3-5 days", they must have just processed that basically immediately.
But perhaps I was just lucky. I'll see the next time.