Padbury Clock Screensaver - Minimal screensaver for Mac
System76 Oryx Pro - System76 Oryx Pro is a powerful and customizable laptop that comes with Linux pre-installed, but y can easily install Window and dual-boot if you want to use it for Windows development or gaming.
Clock.saver - A simple clock screensaver based on Braun watches ⌚
Dell Precision 7730 - Very robust 17" workstation with flexible configuration options, the cheapest display is not recommended however. Read review here.
iScreensaver - iScreensaver is a multi-featured software that uses Image, Live Photo, Video, Movie, and 3D Model files to create screensavers for Windows and Macintosh.
HP ZBook 17 - The performance of a desktop with the freedom of a laptop.