Tony's Chocolonely is an interesting brand, because its origin lies in a Dutch TV show investigating consumer goods. At some point, the presenter ("Tony" [1]) decided to sue himself for buying slave chocolate, and then decided to see how hard it actually is to make slave-free chocolate - and Tony's Chocolonely was born.
As I understand it they're less strictly idealistic than they used to be so as to be a profitable business, but at least it wasn't an attempt at fairwashing an existing brand.
[1] Actually Teun (van de Keuken), but that doesn't work well in English.