reMarkable 2. I was looking for a sketching and note taking tool and got a decent eBook reader as a bonus. The UX is very nice and distraction-free. It works surprisingly well for drawing as well.
My only complaint is the lack of Linux support for the app that allows mirroring the screen to a computer. Would be really cool for sketching stuff during online meetings.
You can mirror to Linux using rmview! I've used this for Zoom whiteboarding a few times already, and it works really well. It has a configurable "laser pointer" that appears when you hover the pen slightly off the screen, and you can rotate the mirrored window in any orientation if you prefer to go landscape.