Hey welcome to byc! I wanted to post 'cause we have all the breeds you're interested in. They are all in our first generation birds so they are about a year and a half. The friendliest by far out of every chicken we have had so far the buff orpington has been super kind and is a bit of a lap chicken. Although if there is somethings going on like a rake being busted out or a shovel, or anything really then the barred rocks are all over it. One of our four barred rocks are broody and well into her 2nd week on a six pack of eggs. The SLW is a bit of an aggressor. The Light Brahma is a sweetie but her name is Lovely. Rightly named she is very sweet but not huge on being handled. So I guess my picks would be Buff Orpington, Barred Rocks, Light Brahmas, The the SLW. We have made a note in the past that we won't try the Wyandotte breed again. You might want to try cochins also. They have a very calm disposition. Mine have been hand raised and most are very human friendly and just adorable. Great mamas too!
Too many breeds to limit yourself though. Once you get goin it will be easier to get new ones that peak your interest. It's a lot like tattoos really. The first few will be a challenge to pick out but once you get goin you'll just be happy be goin to pick up a few more. Enjoy!