So is the assumption that Drakul was always bad and wouldn't have been worthy of receiving Soulfire from a Sponsor?
Because let's remember that the historical Drakul (Vlad II Dracul) was a first-class member of the Order of the Dragon, a chivalric order that supported the Holy Roman Empire. He swore to defend it, and their code was "in company with the prelates, barons, and magnates of our kingdom, whom we invite to participate with us in this party, by reason of the sign and effigy of our pure inclination and intention to crush the pernicious deeds of the same perfidious Enemy, and of the followers of the ancient Dragon, and (as one would expect) of the pagan knights, schismatics, and other nations of the Orthodox faith, and those envious of the Cross of Christ, and of our kingdoms, and of his holy and saving religion of faith, under the banner of the triumphant Cross of Christ."
Just how devout or useful Vlad II was to the preservation of the Church is questionable, but he was a warrior king that fought against other nations and religions.
Who's to say that he wasn't given power as a Starborn, but he went down a dark path after that and became something else?