Luffy is an icon against every oppressive regime, he fights to bring freedom to the masses and rid the world of the fascist government and then there's Naruto and Ichigo who fight for those oppressive regimes to keep intact the atrocious norms of the olden age
The reason why this arc is so high on my list is because Oda balanced Usopps storyline, franky’s storyline, Robins storyline, franky flashback, robins flashback, luffy’s development as a captain, the world building of the world government, inner turmoil with the crew, amazing