This is a very informative thread, but it should be crystal clear that Germany finds it quite easy to prove money laundering, terrorism financing, and any other accusation they can come up with when you move your secret savings of 1 million euros to another bank. Germany is part of the EU, and...
If possible Dubai or Monaco I agree. For some people it's not an option to live any of these places and they may want to look into countries like Bulgaria, Cyprus and Portugal which have been discussed here. They are not 0% tax countries but they are some of the lowest with income tax.
Corporate tax in Gibraltar is 12,5% makes it the same as Cyprus for instant. There is a capped tax rate for high net worth people, but I can't figure out what the tax rate is for this group.
how did you go about it if you don't mind to share your knowledge?
I would say relocating is the best way to avoid taxes long term, if you don't want to risk they come after you one day and ask you to pay taxes and fines.