One vote for Mullvad. Like you I moved from Surfshark but that was a year ago. Never looked back.

There is a server list page on Mullvad to let you see the bandwidth of each server they have in each country. Take a look and pick the faster ones if necessary (they have all been ok for me fast or slow when I stream).

Note however I don't have Netflix account etc. I stream from a "members only" IPTV service.

I don’t use any of the ones you mention, but am pretty happy with PrivateVPN. It works well as an app on my iPhone, but the main use case is for torrenting. You can connect to privacy focused countries and do kill switches so you don’t leak your ip. I used Surfshark as well, but the torrenting part was lacking a few years ago.

I'm a professional reviewer of VPNs (among other things). I'm afraid it's impossible to name one "best performing service" as that depends on factors such as which ISP you're using, where you're located, where the server is that you want to use, and what load it's under at that time.

However, I can tell you that in my tests Express VPN, Hotspot Shield and IPVanish all had very decent performance and successfully unblocked all the streaming services I tried, namely BBC iPlayer, ITVX, Channel 4, Now TV, Netflix US, Disney+ US and Hulu.

I’ve tried almost all of them. Express has been the most reliable as well as Hide. me They both stream extremely well.