Fuji is doing something, or intending to
Zoro doesn't even intend to secure good in this world because he does not believe in any objective good, he is a moral relatavist and this is reflected in his ambitions and dreams
everytime Zoro sees something on his path he thinks is evil, he fights it
a marine and his dog attacking people on the street? he deals with them
a bunch of pirates attacking a city of innocent people? he slashes them up
Zoro is always helping and doing something when he sees the evil in his face
Zoro is the first character in this fucking manga that almost killed a fucking Celestial Dragon, no hesistation, because they were trash
Luffy and Zoro are much better than any of those trash admirals