I suspect that Israel has quite a secret drone program including stealth glider drones with decent payload.
I would bet that the US probably has drones capable of traversing the globe without detection. They are probably two or more generations ahead of the ones we get to see or hear about.
The nation that nobody really talks about that likely has some very advanced stuff is Japan. They remain an electronics and design juggernaut and they increasingly view conflict with China/Rocketman as likely. 3rd largest economy in the world and they are still a high-end manufacturing powerhouse.
Good point on the drones—if you dig you will find out that the US was testing aircraft sized drones around 1980 at Kirtland AFB when nobody had a clue what they were.
That was more than forty years ago....