Never mind the Last Alliance and the ring and stuff....... there is more interesting stuff to deal with first. For instance, Isildur lived in Numenor, he was one of The Faithful and what a terrible time they must have had. Sauron, once he had taken control, demanded human sacrifices to Melkor and who did they sacrifice - members of The Faithful!
There after the fire and smoke went up with out ceasing; for the power of Sauron daily increased, and in that temple, with spilling of blood and torment and great wickedness, men made sacrifice to Melkor that he should release them from Death. And most often from among the Faithful they chose their victims; yet never openly on the charge that they would not worship Melkor...
And they sailed now with power and armoury to Middle-earth, and they came no longer as bringers of gifts, nor even as rulers, but as fierce men of war. And they hunted the men of Middle-earth nd took their goods and enslaved them, and many they slew cruelly upon their altars.
From The Silmarillion : Akallabeth
Isildur saved fruit from Nimloth so that the White Tree could be preserved and he sailed with The Faithful away from Numenor before the terrible wrath of the Valar destroyed it.
What a life this guy had and all this before the Last Alliance and the Ring.
The flight from Numenor and its destruction reminds me of Sodom and Gomorrah (sp?).