Johan, the mass murderer, has no mortal sins? Care to elaborate?

Edit: I now realize you were referring to the seven deadly sins. I think the novel version of Anton Chigurh may count; he returns the stolen drug money to his employers as intended, rather than greedily taking it for himself like in the film. From what I can remember, he has even more conviction in the novel that he’s an agent of fate, delving further into his philosophy and never betraying his purpose (although it still comes crashing down for him in the end). Unsurprisingly, the Judge might also count, barring his… tendencies towards children (lust)—but it isn’t clear if he rapes children because he’s genuinely a lustful pedophile, or if he does so simply to inflict more harm upon them. He’s also obese, but I doubt that it’s because he’s a big eater or anything.