I’m not a huge fan of complicated rules-based NPC generation. Mostly this is because 90% of my NPCs don’t end up in combat with players. So most of the time spent generating stats is wasted. To me, 5e is too complicated in terms of generating NPCs. I tend to focus on an NPCs personality, their voice, their background, generally speaking their stats are irrelevant to me. But I will also admit that I prefer streamlined rules (not so much rules-lite, but systems that are efficient and where I don’t need to reference a section for every situation that arises). Rules-lite games can certainly also be fun.

So, in any case, I guess I’m saying I prefer the story side of NPC generation to the crunchiness.

I use this generator as a sort of base idea for a dungeon and then modify it. Even so, it's super helpful and a great tool.

I'm a fan of the Ironsworn character sheets. They manage to make tracking a number of different sliders really easy and straightforward. And it is all a single sheet (plus some cards for assets). Efficient.