Dell XPS 15 2-in-1 is the large convertible you want - GadgetMatch
XPS 15 Laptop: Dell XPS Laptop Computers | Dell USA
Amazon.com: New XPS 15 2-in-1 9575 8th Gen Intel i7-8705G Radeon RX Vega M 15.6" FHD (1920 x 1080) InfinityEdge Touch Display Active Stylus Pen Plus Best Notebook Stylus Pen Light (2TB