Hey! (I've known you for a bit, what would you like me to call you?

)
I would suggest SF hens. I never had the rooster, although I would like to own one someday in the near future. Personally, they are my third favorite breed.
Just keep in mind... They are pretty noisey! They never shut up nor do their beards keep dry. But they are beautiful, extremely docile, protective and very- almost too motherly.
Out of the ones on the list... SF.
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I don't have any personal experience with bantams, so I'm not sure if the temperament is the same as standard... But I love full sized BO. My first breed!!
Perfect starter breed and good for a prject. Another breed that isn't on your list that I think would be beautiful for a project and are very wonderful of birds is NH.
Have a nice evening! Please fill us in on what you choose and how you like them.
-K
P.S
I personally don't like the speckled Sussex, not my first and not my second pick.