How about a simple drip coffee maker?
Coffee = Water + coffee + heat
Water - add water to the tank
Coffee - add coffee to the filter
Heat - add electricity with a button
Dieter Rams understands this, your best coffee maker would be the Braun Type 4085 / KF 400 10-Cup Coffee Maker
Even simpler are these cold brew coffee makers that have become popular:
I also don’t like the pad machines. I prefer either something extremely simple or a lab-like installation allowing me to adjust every possible setting, not much in between.