The debate about the most powerful hero in MC Comics is endless, but my money's on Doctor Strange. His mastery of the mystic arts puts him in a league of his own—time manipulation, reality warping, interdimensional travel... the guy's basically a walking deus ex machina. Remember how he held his own against Thanos wielding FOUR Infinity Stones? Wild.
That said, Scarlet Witch comes close post-'WandaVision'—her chaos magic rewrote reality on a planetary scale. But Strange's versatility and strategic mind edge her out for me. The Ancient One once called him 'destined to be the best of us,' and after 'Multiverse of Madness,' I can't argue.