Well given that saddle manufacturers don’t set out to make saddles that make your bits numb, and they probably tested them before making them, one can only conclude that everyone’s bum is different, and therefore the only option is to keep trying til you find one you like.
However I would like to point out that setup is crucial. Your nob goes numb when there is pressure on your perineum instead of on your sit bones where it’s meant to be. Possible reasons:
1) Saddle is too narrow, so your sit bones aren’t being supported
2) Saddle is nose up, so the wide bit isn’t supporting your sit bones
3) Saddle needs to be slightly nose down. My road bike needs this to get weight on my sitbones.
4) Saddle is too far back, so the wide part isn;t under your sit bones
Once you are aware of the position of your sit bones you start to notice it.