You've not wasted your time at all. If I'd had access to that kind of research whilst a JW maybe I would have been out earlier. Schizm may not appreciate or even understand this kind of analysis, but who knows who else may be reading it.
There have been a couple of comments along the lines of 'what a boring thread', well fine. They can stick to the 'What's your favourite kind of milkshake?' type threads. Remember many JWs became JWs because of their prophetic books and speculations. So this kind of information is invaluable to any of those who may be lurkers. Just keep up the good work!
While there are minor problems here and there in the details (e.g. 13 Seleucid and Ptolemy kings preceding Antiochus IV instead of 10),
If you look at just the Seleucid kings then the first seven kings are easily identified as Seleucus I, Antiochus I, Antiochus II, Seleucus II, Seleucus III, Antiochus the Great and Seleucus IV. There is no consensus as to whether Alexander the Great should be included in this list.
The three horns uprooted by the little one are likely to have specific reference though. The best explanation is that these three horns were kings or claimants that Antiochus Epiphanes supplanted in order to reach the throne. In fact when Antiochus the Great died, Epiphanes was only fourth in line to the throne, being preceded by his brother Seleucus IV, and his sons Antiochus and Demetrius. Seleucus was murdered, Demetrius was taken as a hostage to Rome, and the younger Antiochus was also murdered. If these were the three horns that were uprooted then the first seven would start with Alexander the Great.