3rd gen had some terrible anatomy going on, but saying it's worse than 1 is outright ludicrous, especially because the shading neat was quite neat
Anyway
4>5>3>2>1
4 on top because while the style is the same as Gen 5, Gen 5 had less posses and everything was a pixelated mess
I won't count Gen 6 for now, altought I will probably end up on top depednign how it handles complex designs like Xerneas and Kyurem formes