If you need a keyboard NOW, take a severe look at the Kinesis Advantage 2. It has a learning curve, but it's a small price to pay to have a very comfortable typing experience AND incredible customizability it offers (e.g., macros & hardware-defined key re-mapping). However, don't bother downloading the software as it's not great.

BUT, if you can wait a few months... they have a modern version slated to release this summer.

https://kinesis-ergo.com/keyboards/advantage360/

IMO it fixes most if not all issues I have with it.

  - Wireless via Bluetooth
  - Ditching USB-A for USB-C
  - Split keyboard while retaining its finger ergonomics
  - Update styling, which will (hopefully) be much easier to 
    transport and less of an eye-sore
  - Ability to change 'tenting' which should increase 
    ergonomics

If you end up getting either one, you won't be disappointed. I went from needing to take off work due to wrist pain to no pain at all regardless of time. It was well worth the $350.