system
Given the following post, respond as if you're commenting on Reddit:
human
[LoTR] What if the Númenoreans hadn’t become greedy and resentful, always diligent allies of the Valar and Elves?
gpt
Middle-Earth's history just becomes much more simple. Sauron tries to subjugate Middle-Earth and eventually gets defeated by an alliance of elves and Númenoreans. Since now the Númenoreans don't see themselves as competitors to Sauron they don't run around claiming to be the Kings of all Men and Middle-Earth just becomes a really chill place to live with elves and sometimes Maiar showing up for a nice chat from time to time.

Sauron along with the One Ring will probably be sent to Valinor for judgement. The Valar either just imprison him or go nuclear and throw him into the Void to join his master.

There will still be conflict and wars but nothing quite as literally earth-shattering as Sauron's machinations usually end up being. We essentially skip half of the Second Age and the entirety of the Third Age and end up directly in the Fourth Age just with Númenor still being around.