I have always considered Yves Tanton a very good yacht designer with good original ideas. But it seems he suffered from having the wrong owners of his boats, because he never seemed to get the recognition he deserved.
He was designing light displacement boats long before it became fashionable. But he never seemed to have a boats in the hands of an owner who got good publicity.
Olin Stephens had very good fortune in that department. Olin had some boats that did not realize their potential but he had enough boats good boats in the hands of capable owners.
Juan K has had more than one keel fail, but again he has had enough successes to push the mistakes into the shadows.