UK, Germany, Scandinavia, Netherlands, Philippines are great, and all have many English speakers.
Can personally attest to Denmark having loads of English speakers.
I encountered exactly one person in my travels there who did not speak fluent English.
I’d learned a little, so I tried to use Danish to order things, ask directions etc, and everyone replied in perfect English.
I went scuba diving in Belize. Tiny nation just south of Mexico. Former British colony, so everyone speaks English. Very nice climate. They have some of the best diving in the world, because they are next to a huge coral system. There are Mayan ruins and some interesting caves.
It depends what you want to see from the US. The US is massive and there is a huge difference in visiting NYC vs visiting Omaha.
It also depends where you are. For example if you’re in the EU then visiting places like Paris or Amsterdam are probably out as they are accessible as a day trip.
If you’re looking for an alternative to the USA’s big landscapes and natural parks then Canada is your best bet. If you’re looking for more cultural stuff and things to do in cities then Canada only has a few nice cities and they’re spread across the country from coast to coast.
Siberia, Russia or Svalbard, Norway
You were planning on going to rural Alaska, right?
If you’re concerned about language barriers then Singapore is great.