User blog:ChiroSamai94/Straw Hats Rival??

So this occured to me earlier this evening on whether if the Straw Hats (or Luffy specfically) has any particular rival to them. I'm not talking in lines of like "Smoker and Luffy" or "Mihawk and Zoro" just something like Whitebeard and Roger had. Was there ever a crew or a person that could make a formidable rival with the SP?

List some possiblities if you want. :)