Brooks Cambium C17 Carved .... designed for long distance and I have them on both my bikes (100% waterproof aswell and comes with a 10 year guarantee when you register the serial number on the Brooks website)
I've had good result with this saddle too. Notwithstanding that saddle choice is inherently personal, I've found a cutout saddle to be the big difference, with a strong preference for a firmer saddle as well as a saddle of the correct width. As an example, I found the popular B17 Brooks to be completely unsuitable due to being too wide and having no cutout., Currently I'm using an aliexpress carbon saddle at 145mm width, which I did not expect to be comfortable, but which is surprisingly useable, due to the width and the presence of minimal padding and a cutout..