Garp's reputation as a powerhouse in 'One Piece' isn't just hype—it's built on decades of legendary feats that even the current admirals can't match. Remember Marineford? The man charged headfirst into battles against Roger and Whitebeard, earning the title 'Hero of the Marines' for a reason. His raw strength and Haki mastery are borderline mythical, like when he nearly killed Don Chinjao with a single punch. The admirals are terrifying, sure, but they're products of a system; Garp's strength feels organic, honed through sheer will and countless wars. Even Sengoku treats him as an equal, and that says everything.
What really seals it for me is how casually he operates outside the hierarchy. He turned down promotions to avoid Celestial Dragon nonsense, yet still commands respect from everyone, including the Fleet Admiral. That kind of freedom speaks volumes—he doesn’t need titles to prove his might. The admirals rely on Devil Fruits, but Garp? Just fists, guts, and a legacy that makes you think, 'Yeah, he could probably solo most of them.'