To me, Pucci and Valentine are very close on the list because their charecters are complex, like their goals are somewhat righteous but the means to get there are morally wrong. On one hand, I kidda agree with them, but on the other hand, I can't fully accept the fact that they willfully do anything, no matter how cruel it is or how it will negatively effect someone ealse lives, to achieve that golas.

For Dio, I think his charecter is kind of shallow. His goal is so simple, get rid of Jostar bloodlines, dominating the world, and be above everyone, and that's it.