I've flown F internationally in the last 2 years on LH,LX,TG,EK,CX,UA,NH

Out of that very limited pool, I would also rank TG as best ground service, although EK gets you to the airport, LH drives you to the plane in a car, LX drives you to the plane in a bus.

In the air, its really very objective, sometimes depends on the plane you are on, amount of pax in the cabin, cabin crew mood of the day, etc.

I cant really say one was way better than another. They were all pretty damn awesome.

well except UA, their Global First doesnt really qualify as first class.