Red and black sex links, ISA browns, golden comets, white leghorns, black australorps and rhode island reds. All available all over the place, cheap, lay 250+ eggs a year depending on environment.
More heritage/dual purpose wise you could look at plymouth rocks (especially white and barred), wyandottes, orpingtons, brahmas or any number of other birds for a slight reduction in egg laying but more color in your flock.