No TV-out without dock. Alternatives?

[Pyro as Bill]

I'll probably get another dock(s) at some point but until then what would be a good alternative if I want to use Switch on more than one TV without unplugging the dock?

Is USB-C to HDMI enough if not worried about battery? I assume it will output at 720p/lower clock without power?

 

Would this work for both power and HDMI-out?

 https://www.amazon.co.uk/Anker-Delivery-Charging-Specification-ChromeBook/dp/B018XF4KRC?tag=skim1x143738-21

 

Any other alternatives?