>>7837284Not counting alternate timelines and focusing on costumed accuracy, only three: Sunfire (who's AOA costume was co-opted for his Horseman garb and was released as an exclusive figure early on in the Hasbro ML line), BAF Caliban, and the deluxe reissue of Archangel with alternate Death head.
Rounding that out, you can also toss in Gambit and Polaris; though both had alternate looks/costumes (Polaris wore a full-body knight armor that hid her gender until they revealed her as the knight) and Gambit was a goth version of gambit with coal black skin, white hair, and a brand new power set (the ability to belch out poison gas that killed instantly; a move Poccy made to make Gambit the weakest Horseman due to Gambit outright telling Apocalypse to his face he'd betray him first chance he could).
>>7837265War's the only one I can see be made. Confederate drummer guy, Geisha that vomits flesh eating beetles, and evil magic carpet riding magician require too many unique sculpts whereas they could probably jury rig the Minotaur guy out of one of the beast guys and reuse the parts down the line.