Dare it be said that there might be Wikipedians as erudite as yourself? Sorry, almost forgot, there's no oracle that can equal a dispensational oracle.
Have you ever contributed to Wikipedia?
You conveniently neglected to cite Justin Martyr's acknowledgement:
"I and many others are of this opinion [premillennialism], and [believe] that such will take place, as you assuredly are aware; but, on the other hand, I signified to you that many who belong to the pure and pious faith, and are true Christians, think otherwise."
So there were many amils. They just didn't happen to be writers. Perhaps in their acceptance of the doctrine as scriptural truth, they didn't believe that it needed to be vigorously defended.
Regardless, Martyr's tone reflects the amicable relationship between premils and amils to which I alluded earlier, a marked contrast with the acrimonious and adversarial attitude with which dispensationalism regards its dissenters today. This is unsurprising; Martyr and those like him were classic/historic premils, whose only significant difference with amils was their conviction as to whether the millennium was literal or spiritual. As Wikipedia (whether or not you choose to recognize it) observes:
“Premillennialism appeared in the available writings of the early church but it was evident that both views existed side by side. The premillennial beliefs of the early church fathers, however, are quite different from the dominant form of modern-day premillennialism, namely dispensational premillennialism.”
Given the Roman Empire's supremacy across the world of his day, one can understand Jerome's presumption that it would persist to the end of the world. Jerome died in 420 AD, but had he lived only a relatively few years longer, he would have seen the dissolution of the Western Roman Empire by 476 AD. In reference to his Daniel commentary, he would have seen its fulfillments in the ten horns/kingdoms (Heruli, Suevi, Burgundians, Huns, Ostrogoths, Visigoths, Vandals, Lombards, Franks, and Anglo-Saxons), the little horn/kingdom (Papal Rome), and the three horns/kingdoms (Heruli, Vandals, and Ostrogoths). Thus his futurism was of comparatively short duration, and its scriptural fulfillments readily confirmed today in historical hindsight.