I'm gonna say get the widest seat you can stand to look at on your bike. It should provide the best comfort as long as it narrows where your legs go down past it. I'm thinking you don't want much pressure on the inside of your legs in that area.
For myself, I prefer the old "tractor" style seat used on the early Harleys. It is comfortable for me even with very minimal padding.
Just some food for thought...best of luck to ya.

 

The big fluffy ugly one.

 

I have to say, I have had a number of seats (Saddleman and Mustang mostly) on a few bikes over the years and the stock seat on my softail is the most comfortable I have had.