That might be your non-theologian perspective from your tradition, but it is not that of the Roman Catholic Church that has a whole string of post-apostolic '
Fathers of the Church' on its New Advent website. Augustine is but one of many, many church fathers listed here.
Sure sounds like you didn't understand the
fallacy of biased sample in what you wrote. I've provided this link previously so you understand what you did in your post.
You have used another example here of the fallacy of biased sample by claiming that of the 4 examples of church fathers that I gave, Augustine was the only one considered a Church Father in the first millennium. This is simply false as many students and professors of the church fathers will tell you.
Eminent church historian, Philip Schaff, demonstrates the falsity of your view in his
History of the Christian Church in which he articulates the list of early and later church fathers to demonstrate that he, as a church historian, disagrees profoundly with your assessment of who is a church father.
Oz