The Spin 713 offers a 3:2 touchscreen, very good battery life and support for Power Delivery over USB-C. With an 800-Euro price tag, it is not one of the cheapest Chromebooks on the market.
https://www.notebookcheck.net/Acer-Chromebook-Spin-713-2-in-1-Chromebook-with-3-video-outputs.536592.0.html