From the above chart, it is evident that it cannot be before the fourth generation after Abraham when the story of Job occurs.
Perhaps he went there because of the famine which spread along the western and southern shores of the Mediterranean. This would place Eliphaz at an advanced age, perhaps in his mid-eighties, since he was a generation earlier than Job.
This is also implied in the fact that another of the comforters, Zophar, was his grandson. They apparently dwelt just south of the Seir, on the eastern shores of the Dead Sea.
Some of the rabbis, however, take Ram as a shortened form for Abraham.
In either case, he would have been from the same family lineage.
The Book of Job has one central purpose, though there are additional benefits that accrue from its study.