I didn't intend for this to be propaganda, I don't even use it anymore since I'm on grapheneOS now. But I have tried all three. I need to use a VPN in split mode for certain apps, and since using Tor with apps wasn't part of my threat model, I ended up using RethinkDNS (the app only). I don't necessarily like their upstream DNS servers, but considering that I can use my own server (and do), I don't consider that to be an issue.