Here’s my desktop setup for my home office. I primarily had been using Windows for both work and personal, but this year I decided to try and make my Chromebook the primary home computer. The HP X360 is connected to a Dell USB C docking station (one USB C cable for both connection and to power the Chromebook). The Chromebook is sitting on a 3M upright laptop stand so I can use its display along with the 27" Dell monitor.
The smaller Dell monitor on the right is used for my work laptop and home Windows computer, which I still need for a few applications (audio apps, Android Studio, etc.). The 27" Dell monitor has a bunch of input options, so both of my Windows computers are also connected to it, and I just use the input selector on the front of it to switch displays.
A couple of interesting items I just added to make using three computers with the same devices (keyboard, mouse, speakers) are located below the 27" Dell monitor. There is an IO Gear USB 3.0 4-port switch that allows me to connect my Code Keyboard and Logitech MX Master wireless mouse to all three of my computers. There is a small wired switch on my keyboard that cycles to each computer. It works pretty well.
The other little box under the monitor is a Rolls MiniMix II stereo line mixer. With this, I connect the audio outputs from all three computers to it, which then has two outputs (one to a set of speakers and a headphone jack). I can mix the level for each computer and hear all of them simultaneously on a single set of speakers (or set of headphones). It works great while working on the Chromebook and still being able to hear notifications and such from my work computer.