I’m on pretty much the same mission.
Chuwi Surbook is the closest I’ve found.
12″ screen,
windows only
2 fullsize USB
Active stylus.
I’ve seen videos showing the stylus performance. It’s not great… some lag on Photoshop.
If you can bare to lose a couple of “, the Cube mix plus is apparently smooth AF for running photoshop.
I’m not sure if I’d be happy with the screen size though.
Surbook: https://www.indiegogo.com/projects/chuwi-surbook-affordable-2-in-1-intel-pc-tablet–3#/
Cube mix: https://techtablets.com/2017/01/cube-mix-plus-unboxing-first-look-review/
I’m probably going to plump for the surbook.