You could make Necromancer theoretically work, but it requires some lore tweaking:
Basically you make Aether Simulacrums of characters that died during the MSQ that help you in battle (but they're not the real thing), basically the simulacrums are constructed from your memories. So if someone was a fanboy for
Zenos you could unlock his aether simulacrum at lvl 90, Louisoix Leveilleur at lvl 50, Haurchefant at lvl 60, Papalymo Totolymo at lvl 70, etc.
Personally I think it would be a fun optional class to unlock if you beat POTD floor 200 or just POTD floor 100.
It would function similarly to that of summoning a Primal except your just summoning illusions of those long dead based on memory.
Of Course this would mean there is going to have to be two factions of Necromancers; the ones that literally summon the dead and are considered evil, and the ones that splintered off into their own practices of summoning simulacrums based on memories rather than literal summoning of the dead.
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Edit - Also without making a new topic does someone here have a compilation of cut jobs that didn't make it? There was a few that was cut for Stormblood apparently.