He might not be capitol E evil, but I don´t see how you can get around him being somewhat immoral? Sure, he didn´t stop fisher tiger, but obviously as a HK, he did some missions that were evil. They´re literally the war criminal group of the World Government, and I don´t think the fact that he obtained the Nika fruit changes that? It´s not like people in the OP verse know that it´s the fruit that´s the key to taking down the WG? Though I mean, Rocks and Roger are also evil to some extent, it just isn´t super plot relevant.