The most charismatic anti-hero.

I consider Sandro to be the most charismatic anti-hero, but not the Sandro from SoD, rather the ancient lich Sandro from Xeen. He isn't even just an anti-hero, but a nature eccentric to the point of quirkiness (he developed this personality after a prolonged depression caused by his transformation into a lich). And also Castor—Archibald Ironfist's advisor and a Complete Adventurer. He is both very strong and intelligent. After them, of course, are Xeron, Archibald Ironfist, and Sandro as Etric's apprentice. In third place are Nicholas Griffonheart the lich, Xenofex, and Lucifer Krigan.

Added after 9 minutes
Regarding Sandro's "greediness." Did he even have that cash and gold he promised Gem and Craig Hack? Besides, one needs a fair amount of funds. Powerful necromancer artifacts alone won't be enough for the ascent in Deyja.