Necromancy is for the most part evil. You are forcing the undead to be your slaves. Their is a reason most despise the dark art. Can a necromancer be good, sure but it would be like using the mace of molag bal to save an orphanage, the mace is still evil. This is why a collection of necromancers usually end up evil, because advancing their art and attempting to gain more power usually requires a lot of people to die and be enslaved.
No not all necromancy is evil and not all of it is making thralls or forcing the undead to be your slaves, look at the Telvanni most of the wizard lords used necromancy and are they evil? Nope and necromancy was actually taught in the Arcane University until that arkay lover took over before Oblivion. Necromancy is a legitimate school of magic that is often treated negatively due to ignorance and stereotyping.
You have to bind the soul for them to be alive. Why do you think you hear thank you when a zombie is killed.
Actually no, not at all sometimes you can just use your magicka to use their body as a puppet, there have been necromancers who've made zombies without the need of a soul, what you're thinking of is a thrall and even so its still possible to use magicka or a white soul to control the body without the need of a black soul.
Lol, like the priest said she would have the most legitimate claim to the throne being a septiem and all.
False, she would have no real claim to the throne, thats like saying if you revived a member of the Reman family that means they have a legitimate claim when they actually don't. The septim line is dead and has no authority even if one of them were revived and returned to full glory, the septims no longer rule Cyrodiil because the third empire is gone, we are in the age of the fourth empire and the Medes dynasty.