As already mentioned this is highly dependent on why you want a VPN and what's most important to you. That being said, an internet hero by the name of ThatOnePrivacyGuy researched and scrutinized a significant number of available VPNs using numerous data points and compiled them all into a spreadsheet for easy comparison.

The original site is now defunct [0], but has been merged with SafetyDetectives, and so now the full comparison can be found here [1].

Without any other details, that is your best place to start looking.

[0] https://www.reddit.com/user/ThatOnePrivacyGuy/comments/jmuty...

[1] https://www.safetydetectives.com/best-vpns/

Edit: adjusted formatting