You can look at artisans of even a few decades ago. Daniel Roth is never mentioned on this thread, for example, yet IMO his work deserves to be so more than many other brands that are. Ultimately for posterity you need some kind of original angle; otherwise you are merely one of a series of very good artisans. And of course the bigger places have the means to get themselves documented in enough places to create a "legacy" for future generations to dig into (in the same way Dino quotes brochures from the 1980s).I’m not so sure about that. The RM list of customers will be as irrelevant as the time thingies in 100 years.
As for the artisanal charm and technical excellence (i believe its 6-10 seconds a month for a simplicity) of a Dufour timepiece, no competition in mind. History will tell, I guess.