I seem to recall there being purpose-built drawing tablets that are only drawing tablets, and act as a peripheral to a computer rather than a computer unto themselves. That sounds good on paper, since then you can still use the keyboard and mouse for everything other than drawing, but I’ve never used one, so I wouldn’t know.

Also, there are laptops with touchscreens and full-range hinges. With that, you could do your drawing on an actual, fully-functional laptop. I haven’t used one of those, either, though. I do have a laptop with a touchscreen, which could in theory be used for drawing, but it has a normal laptop hinge and can’t be held like a tablet or paper notebook, so actually drawing on it is cumbersome at best.