What about Raithwall guys?
If Vayne is evil then it would no less make sence that Raithwall is because with the help of the Ocurria he created an empire.But since "O my God,Ashe(hero) is his descendant and is good and Dalmasca are such poor guys" the guy is seen as some hero.

Of course this made the people think that the Ocurrians are gods and Venat was somekind of a Lucifer.(duh)

In fact I don´t believe they are fighting ever.They are dumbing people to achieve higher power.

Vayne is evil but not the true villain of FFXII (we also fight Venat in the end isn´t it? Not just Vayne).