We usually hear that it’s London or Zurich due to high salaries being available there, but the high cost of living might take away a good part of it.
In your experience, which is the best city? Feel free to give your own criteria, be it the weather, culture, ability to navigate in English, etc.
If you work remotely, then the world is your oyster. There are many small cities with a good mix of what you like. Finland, Estonia, Denmark, Romania, Sweden, Norway, all countries with such cities where you can also speak English. But if you drop the English requirement and are willing to learn the language, then many more countries fit the bill.
A country in Eastern Europe might do well for a high salary and low taxes. There are a few countries that have tax advantages for people who move there and register in the municipality.