I agree with Contrex, but even so you are misrepresenting Christian theology (if your intention is to misrepresent another theology, please let me know but Satan is most commonly discussed in the Christian religion).
In Christian theology there are no good souls. All souls are worthy of eternal torture, and Satan is very eager to take any human soul. In fact Satan specifically works to make sure that humans go to hell.
Any human that gets to heaven (according the Christian theology) get there through a loophole (at the price of the death of the Son of God), not through any kindness of Satan.
Under Christian theology, I don't think there is any way to say that Satan is a good guy. He is more of a villain that has been thwarted by a heroic act of sacrifice.