One could argue that Delita is fighting for the greater good, but generally he makes choices that benefit himself in addition. So that always makes his motives suspect to me. Ramza is much more admirable because he choses to do the right thing even when it inconveniences him greatly.

That being said, Delita falls further from grace than any other character until he becomes the epitome of the man that gains the world but loses his soul. Characters like Algus or Dycedarg were never all that good to begin with, so their turns toward darkness are not that much of a fall.

I started out feeling very sorry for Delita but as the game progressed I liked him less. Ultimately I pitied him.