So far I have not found something that can be compared to the Seychelles in regards to anonymity. Anguila has as far as I read also no public registrar of company owner ship so it may be well a valid entity.
I came across the website and the books + DVD's they are selling here https://www.davidtanzer.com/Order does anyone have ordered them and know if they are good or useful?
This is not going to work for US citizens for all other countries it may be a way of doing it, most often it's not because of tax reasons but more because of anonymity they do the setup of an offshore corp.