Ergo Pro

This can be a difficult question to answer because different features are important depending on what causes your pain. For the mouse: If forearm pronation, turning the palm down causes pain and the Logitech vertical helps, but doesn’t resolve it, then you might try the Evoluent Mouse, which is more

Matias Ergo Pro is what I use for work computer. It is wired, it has very limited built in rebinding (three bonus keys on left hand side, one on right hand side) but no qmk/zmk/flashing. It is split and tentable (by default, you don't need any stands, it has pretty neato little legs that allow both