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Given that I have the opposite problem - if I use a keyboard with light keys like MX red or blue, I tend to get lots of unintended adjacent keypresses, especially if I am not concentrating.
Hence why I prefer stiffer switches, such as MX blacks, greens and clears. Or buckling springs.
So you could find stiffer switches beneficial.
With custom switches there is not really any upper limit on how stiff they can get.
Super-blacks, anyone? But you don't want to suffer fatigue while typing, which might make your condition worse, or at least less bearable.
Nearly all MX-based keyboards have a standard spacing for the switches, and thus a more-or-less standard size for the keycaps, and gaps between them.
Some keycaps have a flatter upper surface, but tend to be a bit closer together as a result. The conventional cylindrical keycaps are tapered slightly at the top, to make the upper face of the individual keycaps appear slightly further apart.
Given that there are so many combinations of switches and keycaps available, are you in a position to attend a local
meetup, where you will probably be able to try a variety of keyboards to see if you can find one that really suits you?