This Anker charger has 3 ports https://www.amazon.com/Anker-Devices-Including-ChromeBook-Aluminum/dp/B00XU6IMWY?tag=usbctoday-20It would be with power delivery, meaning the dock takes from the power brick via USB-C, and passes it through to the computer.
This dodocool charger has 4 ports https://www.amazon.com/dodocool-Adapter-Charging-MacBook-ChromeBook/dp/B01ALPQXGI
Both support USB-C Power Delivery.
Anker has a reasonable track record for their USB-C stuff. Dodocool has a reasonably tested USB-C phone charger, but I don't know whether that translates to their other products. Both products have a whole bunch of positive reviews related to the 12" MacBook but for USB-C stuff, you can't go by just Amazon reviews.
I'd go with the Anker if you can manage with three ports.