I love my Barred Rocks & they are excellent layers.
Australorps are incredibly laid back.
I would add a silver laced Wyandotte, a silver Campine, a speckled Sussex, & maybe a lavender cuckoo ameraucana. What I don't like are the redish birds ~ ISAs, RIRs, New Hampshires.
I only have 5 currently but have had 6 breeds so I would just add the one I lost to get 6!
Rhode Island Red, Barred Plymouth Rock, Blue Wyandotte, Golden-Laced Wyandotte, Speckled Sussex, and an Easter Egger.