A Dell Dock Vesa mounting bracket that is designed to sit between the monitor and the mounting bracket. Compatible with 75mm and 100mm.
The mounting plate rests in the vesa plate, making installation and cable replacement easier. It uses the WD19TBS dock perfectly fine with this setup. Minimal flexibility when loaded and wired, so we'd call it a win.
Despite the product having many different functions, it is not the most aesthetically pleasing. But it sits behind the screen anyway, so it matters less. Feel free to mix or add suggestions.