Greetings in that Divine and Most Precious Name of Our Lord and Savior Jesus Christ!
Yes, those are indeed the foundation Christological fathers. I also recommend Saint Severus in order to help elucidate further on Saint Cyril who really builds upon Saint Athanasius. I have all those things you mentioned on my hard drive and I read them more often then other patristic writings.
But your thread title is a bit confusing, it seems you really mean "early" or "golden age" Fathers because when I read later I was thinking something more like 10th centuries up until even modern era