Dont bother with the Big Famous Ones, DC can call dibs on their OCs frankly who cares, I mean the CONCEPT of the green lanterns as a faction in your scifi. Like how every fantasy has some kind of Elven peoples.
Like sure you can make a legally distinct version, but what if we just Didnt? "Oh this book's got green lanterns in it?" "Yeah but trust me they put a really interesting spin on it."