Gorck
Prince of Dorkness
My favorite dark Fighter is the Doom Knight, which is based on the WoW Death Knight (but that is already a creature in the Monster Manual), that I made and am currently playtesting.THANK YOU. Finally someone answers my question. I watched all the videos but I must have missed that line while I was cooking one day while watching.
However… it still doesn't mean that the Necromancer is necessarily in the PHB, if they do the Death Domain Cleric and Oathbreaker Paladin in the DMG again. They could easily have an "evil" / monstrous / villainous subclass for most of the core classes in the DMG:
Path of the Zealot or Path of the Beast Barbarian
College of Whispers or College of Spirits Bard
Death Domain Cleric
Circle of Spores Druid
??? Fighter
Warrior of the Long Death Monk
Oathbreaker Paladin
Monster Hunter Ranger (those who fight monsters…)
Phantom Rogue
Shadow Magic Sorcerer
Undead Patron Warlock
Necromancy School Wizard
Fighter is honestly the only one without a truly villainous subclass in core already. The only one in core adjacent that comes to mind is Morgrave Miscellany's Bone Knight Fighter, which does villainous divine undead version of Eldritch Knight stuff.