I’ve been using PIA because they were the cheapest on a 3 year plan. It works out to around $2 a month. It’s not the best because you need to use their app or some other workaround to get port forwarding to work, but it was the cheapest last time I looked.

I use it with the binhex/qbittorrentVPN docker container on my homeserver, it automatically connects and configures the port forwarding to make uploading work, it’s a pretty complicated setup but once it’s setup it works flawlessly.