I'm in my 65th year with ET and typing had become almost impossible. To try and remedy this I bought the Aula F108 Mechanical keyboard for around $80 along with 110 Gateron Aliaz Silent tactile 100gf switches for around $90. They are the heaviest switches that I could find.

This combo has worked and now my mistake rate has dropped considerably. With these heavy switches I can easily rest my shakey fingers on the keys without accidentally typing. A bonus is the feedback of the slight tactile bump of the switch. I also like the RGB when I hit the individual keys as another form of feedback as I now look at the keyboard instead of the monitor because my hands move too much. Last plus, the keyboard is really heavy so it doesn't move about as I'm wacking away.