My $0.02 is that it's trial and error. And there's no one brand or model that works for everyone. For example, I can ride a Terry Butterfly but not a Terry Liberator. I can ride a Sella Italia Ldy Gel Flow but not the Ldy Gel Flow Sport.

If I were you, I'd find a store with a great return policy, order every candidate saddle, and try them all. REI and Terry take saddle returns.

Good luck.