Many Undead characters didn't survive.
Nagash saw the demise of The Lichemaster Heinrich Kemmler (blown up), Zacahrias The Eve Living (brain boiled away) and sort of Dieter Helsnicht (ate loads of Necromancer, became Guardian of Underworld).
Chaos? Glottkin got jobbed by Karl Franz empowered (currerntly in jars in Nurgle's manse)
Dark Elves? Morathi, Tyrion, Tullaris. All d.e.d....DED.
Skaven? Not finished that book yet!
There will be more before The End Times come to a close - and that's when I reckon we'll see the Butcher's Bill totted up by the bad guys as well.