Broly's raw, limitless power and instinctual combat evolution make him an unstoppable force. He grows stronger with every fight, far surpassing anything All For One could handle.
Shanks' unparalleled mastery of Haki, especially Conqueror's, makes him a formidable opponent All For One cannot steal from. His power transcends Devil Fruits, posing an insurmountable challenge.
Isaac Netero's relentless training and Nen mastery culminated in the devastating 100-Type Guanyin Boddhisattva. His sheer combat prowess would overwhelm All For One, even without his full Nen.
Yuji Itadori, now potentially the strongest sorcerer, wields Sukuna's Shrine and Dismantle. His unique connection to Sukuna offers multiple uncopyable ways to defeat All For One.
Kibutsuji Muzan, the Demon King, boasts a thousand years of biological refinement. His multiple brains, hearts, toxic blood, and instant regeneration (a true "Cast" of abilities) make him a near-indestructible foe for All For One.