Okay that's way more replies than I expected. I hope I dont forget any of your questions.
I am pairing it with a 2070 Super
I mainly play Rainbow Six, Total War: Rome 2 and Attila and some Warzone.
I play on 144hz refresh rate. Though I obviously do not expect to reach those numbers in Total War.
Budget wise I'm in the 300-350€ range for CPU and Mainboard.