Runner up is the glove 80, but the only thing is I don't like how flimsy it feels in my hands compared to how solid the kinesis feels.
Glove80 has a better key well and thumb cluster for most people though. I have made a detailed comparison here:
https://danieldk.eu/MoErgo-Glove80-Review
Also agree with the sibling commenters. In order, get:
- Help from an expert/exercise/do very regular breaks.
- A properly adjustable chair.
- A height-adjustable desk (get an electronic one, it's the only one you will ever tune properly, other desks are too much effort).
- Only then an ergo keyboard.
An ergo keyboard is worthless if you do not get the basics right (diagnose the issues, letting the blood flow, having a good posture). I am in some ergo keyboard Discords and it happens far too often that people by an ergo keyboard, but do not even have a setup where they can have a good posture.