I think the spritework in the (not exactly high-quality) Pokémon Quartz hack nails the right idea of the Gen 1 sprites despite being a Gen 3 hack. The shading is often wonky but aside from that, you can tell what the creator was going for, generally, even if they're not especially good.People trying to imitate the rgb style do tend to overshoot (or...undershoot?) for the style. Even "modern" stylings tend to have a little something off than the house style, so I can't blame them for not quite hitting the mark on trying to purposely go off model.
I feel like ideally you'd need someone who is familiar with dot art but not exactly good at dot art to really capture it.