Beside the Dell XPS Developer Edition (that you already mentioned) I would consider the following:

- Lenovo laptops with Fedora preinstalled[1]

- Clevo and its HW customers: System76 and Tuxedo being the most notable ones (I think)

- Purism Librem 14

- Framework modular laptop[2]

[1] https://fedoramagazine.org/lenovo-fedora-now-available/

[2] https://frame.work/