I just bought a rather awesome piece of kit to help me when I am live streaming games. It is called the Elgato Stream Deck and after spending 30 minutes setting it up and can say it is absolutely amazing.
It has 15 buttons on the front but you can nest folders so you basically have unlimited buttons and you can change each button icon to whatever you like. It works especially well if you Xsplit Broadcaster but it does support the latest version of OBS Studio as well.
No more having to click around on multiple monitors when all you are trying to do is change the scene or mute your microphone.
I thought this sounded familiar, I saw a review of it by a great youtuber :)