I wish you the best of luck...just keep working on the birds that you like best...those that have the traits you want.Living in rural Jamaica, i don't have access to any of the breeds you mention. All i can put my hands on are bovan brown hens, and what is locally called "common fowl", i.e. mutts. I am planning to cross the bovan browns with a common/mutt rooster, knowing they don''t breed true. Then keep some of the male offspring and crossing it with more bovans, and working my way up that way. Any comments, anyone?
Nettie Metcalf started with just such a project and developed the Buckeye breed. You can read her story here below, which I find inspiring as she was a regular person working towards a useful breed of chicken that would meet her needs.
http://www.americanbuckeyeclub.org/About_Us.html
Best of luck to you...and keep us posted on your project.
Lady of McCamley