Are we talking about poly-aftertouch keyboards ?
And if we are talking keybed makers that sell to others, we need to include Medeli (see detail at the bottom). Medeli is the parent company to ASM who makes the Hydrasynth. The quality and feel of that keybed is best in my book, of synth feel keybeds that i have experienced. It will do channel aftertouch too, but the poly-aftertouch is even and responsive. The HS does MPE as well, and is both a synth and a controller.
We’ll need to revisit this question again in six months or so when the Osmose is on the market. Expressive E is making this themselves. It will have both poly-aftertouch and MPE, plus adds the X direction bend and vibrato.