Yardbird_tx (can't remember if that is his username here too, but it is on pigeon-talk) breeds Texan Pioneers.
I agree, Oriental Frills are a great medium sized, friendly breed. You'll want Old Style/Old Fashioned type though. The modern show type Oriental Frills have been bred for almost nonexistant beaks and in my opinion, are quite ugly. The ones in the picture above are examples of the Old Style, which can feed their young without a problem.
Figuritas are the smallest breed, super cute, and also friendly. Rollers are fun to watch fly, as well as homers. Homers are my favorite because the training is fun, they are smart, and fast. Any breed of pigeon can be tamed and can be friendly, you just have to work with them like any other animal.