Rhode Island reds are very reliable layers and have a long lifespan, but if you get them with other smaller breeds sometimes they can have attitudes with the others. I have a 9 year old currently, so I’m not kidding about life span. (Also editing to add: their attitude is by no means a bad thing. Sometimes these big girls are the protectors of the flock’s food chasing off other critters trying to get into their food, which is very funny to watch.)
Plymouth barred rocks are very friendly birds, no complaints.
Americanas I think are pretty great, pretty birds and eggs, mixed personalities mostly good, pretty hardy birds overall. They usually get along well with other breeds.
White leghorns are another really reliable egg layer. Get along well with others.
I just got my first gold laced wyandottes last year and I think they have great, sweet personalities and beautiful feathers. They usually group themselves with my smaller breeds.
It really depends on what you’re looking for! And also I would say if you’re looking for a mix or just one breed.