Who is more like a necromancer? Warlock or Shadow Priest?

[Kneeshooter-amanthul (Kneeshooter)]

What is more like a Necromancer/Death magic user?

before i go on, ive sent this question in game in the general chat several times and ive gotten 99% responses back as Death Knight. i know an Unholy DK is the closest thing to a Necromancer since the undead minions and death skills, but im looking specifically between the two spell casters. A Warlock or Shadow Priest. Now here is my opinion. i know warlocks are based around death magic and summoning demons as their servants therefore very close to a necromancer but Shadow Priests have Vampiric …

That one perhaps, by the same person?