We had Leghorns with our very first batch of chickens. We were just starting out, & my grandpa decided we needed to butcher the entire flock after 2yrs, & start over in the spring. We did this for a few years, before I started researching chickens, & learned they can lay longer then two years...
Purebreds I have that are great layers are:
Buff Orpingtons
Heritage Plymouth Barred Rocks
Brahmas(Mine are taking a winter break)
Easter Eggers(Taking a break)
Old English Game Bantam
Golden Sebright
Project Wheaten Crele Orpingtons(Discontinued)
CrackerFowl hens.
Silkies
Mixed...
I always go for the less productive breeds, & have a good amount of hens. They lay alot longer. I have an 7-8 year old Mille Fleur D'uccle hen that still lays eggs. Just not now since it's winter.
I have 35 laying hens, of various breeds, & mixes.(No Production Hybrids)