HP's mobile workstation ZBook Studio G7 is very slim and competes with devices like the Dell Precision 5550 and Lenovo ThinkPad P1. The GPU performance is very good thanks to Nvidia's Quadro RTX GPUs and you can get a very bright 4K DreamColor display.
https://www.notebookcheck.net/The-HP-ZBook-Studio-offers-plenty-of-GPU-performance-and-a-very-bright-DreamColor-display.529013.0.html
If you are a power user and think you could improve the temperatures with undervolt then this is not the laptop for you. All Zbook BIOSes have been locked down for undervolting. That was such a great way to keep temperatures in check while maintaining even higher performance for advanced users. It was removed without notice, with no way to éven downgrade to a previous firmware capable, because of some artificial limitation. It would be a great option they could reintroduce as a toggle in BIOS.