The project is https://plants-by-fred.itch.io/streamer-chat-farkle
 It is  currently playable in testing and RO mode, and it will be the announcer I am after. (toggleable in the testing panel, F12)
If you play the game, you can toggle the current AI announcer and sort of see what I was after.  Be aware that the AI is horrible and only there for timing and runtime testing.
The game has several events during play. When an event happens, the announcer comments.
I have a prelim script that is open to improvement and welcome suggestions.
It is the attitude of the announcer that I have been having trouble finding. I am after a cheeky and bombastic fellow pushing buttons. Partly as comedy, partly as distraction.
If you can pull off a "Howard Stern"/"Rodney Dangerfield"/ "Al Bundy" sort of "poke em in the eye" sort of feel but subtle and veiled so the participants aren't really sure if they have been insulted or supported, I would be ecstatic.

I am aware that this has significant dependence on the actual script content, so again, open to suggestions.

This platform is difficult to work in, so here's my Discord server. We can continue there if you want to play.

https://discord.gg/EAaEeb5b

Thanks for the offer.
John.