Thunderbolt 3/USB-C Dock
At my day job, I recently rolled out one of the new MacBook Pro laptops with USB-C in it. Because it only had 2 USB-C/Thunderbolt ports, I needed a way to expand it. This user wanted 2 external monitors, wired ethernet, power, and a few extra ports in case of iOS device charging needs.
After researching a few options, I settled on the OWC 13 Port Thunderbolt dock. While it's not the cheapest, it's well worth the money. It includes 2 USB-C plugs, wired ethernet, mini display port, firewire, and 3 USB-A ports. You can connect a 5K display, two ultra HD 4K displays, or a combination of 4K, HD and other displays with the mini DisplayPort port and additional USC-C/Thunderbolt 3 ports.
The device is manufactured by OWC, so you can count on it being a quality product. You can buy it on Amazon for $299.99.