I can't say enough for Australorps. LOVE them to death! They are gorgeous, friendly, GREAT egg layers, and have TONS of personality! My current BA is the best alpha hen anyone could ask for!
EE's are also great! Even though they are mutts, all of mine are great. NONE of them aggressive. The two I hand raised are AMAZING girls, and even the three I bought at the auction are good girls. Most of them are SO calm and collected. Shy, but calm.
Personally, I dont like wyandottes, at all. If you have any docile breed, they will pick on them. All the wyandottes I've had have been aggressive. While they are decent egg layers, and are very pretty, I just dislike the breed for the behavioral issues that I have encountered.
ALSO - forgot to add that they were flighty!
I really think that you would like langshans and brahmas!