if you are looking for a country where taxes are low (around 14%-16%), good english schools for your kids, adult-friendly and low crime rate, then theres no other choice in Europe than Switzerland.
I recommend Zurich (highest quality of living world-wide), Geneva (#2 i think), Berne (somwhere in the top 10) or Lausanne.
But theres always the other side. Nothing is free. Switzerland is for sure one of the most expensive countries when it comes to costs of living.
up to you