I've owned all of the breeds you mention except White Orpingtons (although I've owned Buff Orps). If you're not already aware of it, the Ameraucanas sold by hatcheries and feed stores are not true Ameraucanas, but Easter Eggers which are hybrids produced by crossing blue egg layers with brown egg layers to produce offspring that lay eggs in colors other than just blue (most commonly some shade of green). The only hatchery that breeds true Ameraucanas is Meyer Hatchery which sells Blue Ameraucanas and they charge 5 times as much for them as they do for their Easter Eggers.
What breeds will work best for you depends on what you are looking for in a breed. If sheer egg production is your main priority, White Leghorns (for white eggs) and sex links (for brown eggs) are the best layers in the chicken world. These are the hens used by laying houses for egg production as they are laying machines, consistently churning out more than 300 large eggs per hen per year.
If you are looking for breeds with an excellent temperament then I would suggest going with some of the breeds that have a well deserved reputation for being calm and gentle (great lap pets) such as Australorps, Faverolles, Orpingtons, Sussex, Silkies, Cochins, and Brahmas. Of course there can always be an exception with any breed. If high egg production is a priority as well, Australorps are the best layers on this list and Silkies and Cochins are the poorest layers (although they are the best brooders and mothers). Faverolles, Orpingtons, Sussex, and Brahmas are all good layers.
If you do decide to get Silkies which are bantams, I would not recommend keeping them in the same flock as your standard sized breeds as they are likely to take a beating from the larger breeds. For this reason we ended up having to remove our Silkies from the main flock and keep them in their own separate enclosure.
Whatever breeds you end up getting, good luck with your flock. :o)