Get Total War Warhammer and play as the Vampire Counts. Your necromancer / vampire lords can control 1000s of undead of various kinds at once while blasting away enemies a dozen at a time with dark magic.
But is a strategy games. Strategy games tends to have better necromancy than RPG's. That said, I hope that Larian will do a great job with necromancy, but we will not gonna see animate dead on EA.
