Since some people here gets touchy about trying discus real world moral. Let me give you much more themed example. Not even just D&D-themed, but specifically Forgotten Realms. Or specifically FR cosmology, earlier known as Great Tree (now it doesn't have any name, but that's mostly because 5th edition cosmology lore mainly is a huge mess).
Most of you probably heard of Lathander. Most consider him as THE most good-aligned deity.
What many of you might not know, is that at some point (very far in the past) Lathander rebelled against established nature of cosmology, and attempted to reform it entirely, putting himself on the very top (so practically he attempted to unseat Ao himself). The event was known as Dawn Cataclysm.
Reason of it mostly was that he couldn't stand of nature of good vs evil balance. And wanted re-establich cosmology only with forces of Good dictates how things are, and all evil being relentlessy hunted down.
His attempts ultimately failed, causing of death of several gods in the process. Helm specifically could never forgive Lathander for death of his lover.
So... good intentions, that ultimately lead to horrible disaster. And by all accounts Lathander still is good-alligned god.
Another interesting example is Jergal. An evil deity that at some point grew to an immense power. No other gods (besides an Ao again, of course) could compete with him.
But in the end... he just grew tired and bored of his powers. And he just gave those away (well, most of it), and instead "retired" himself simply as seneschal of the Kelemvor (before Kelemvor - Cyric, and before Cyric - Myrkul).
And although his actions doesn't really brought anything good (specifically that's what gave goodhood to Bane, Myrkul and Bhaal), he himself broke the prejudging cliche about that evil would never give up on power in his possession.
Last edited by Redwyrm; 31/07/23 09:26 PM.