Amandil, a few years before the Invasion of Valinor, sneaked off the island with three of his most trusted men and attempted to sail to Valinor to ask pardon and forgiveness for Númenor. He was never heard from again, though it is possible that the Valar heeded his plea considering the faithful were spared and their ships were pushed to safety from the Destruction of Númenor.
Would the Valar have spared the faithful if Amandil had not attempted to sail to Valinor and beg them for forgiveness?
If you recall, the faithful led by Elendil and his sons, Isildur and Anarion were spared from death on the day of the downfall of the Land of the Star. Westernesse itself was not spared after its king and so many of its people fell back into the worship of evil. But the Faithful mounted their ships and the "consuming wave" carried them "like birds of the storm" to Middle-earth, where they established the kingdoms of Gondor and Arnor in exile.
It's not known in the story if Amandil ever reached the Blessed Realm but Tolkien suggests that Elendil and his followers, The Faithful, may have been spared from the destruction of Númenor because of Amandil's mission to Valinor.
