Here's the best, IMHO-
I've had many different bikes, with many different saddles, and different engine types. The best one I found was the old hairpin style (used on the X-Country Whizzer) Here is an example:
It is leather stretched over springs. There is no hard pan directly beneath your backside.
What I found is that once the leather stretches and forms to your personal "contours", this sort of craddled suspended seat is the BEST.
Like I said Just my Humble opinion...
Rif