I run a Fizik Gobi on mountain bikes, a Fabric Scoop on the cross bike and a Fizik Arione on the road. I’ve used all sorts in the past, but these work pretty for me. Fizik has an app which supposedly helps you select q saddle based on three notional rider ‘types’ and Fabric similarly offers three different profiles based on your personal preferences / riding position / mobility.
I like the Scoop and I’d definitely consider using it or a variant if I replaced a mountain bike saddle. The Fabric saddles are really nicely constructed, similar profile to the Spoon but without the stitching. I found the Fizik Tundra a bit hard and flat for me, but it’s really down to what works for you.