Pagans do not have a concept of “sin”. The Is All is made up of everything, not just love, passion, and happiness, but also malice, hate and violence. The thing arn’t at all unnatural (as Christians think sin is), they are part of nature.
The difference between us and the gods is simply power. They are vast, powerful beings that compose large amounts (relative to the rest of the universe) of the Is All, so much so that they reflect universal truth by acting as archetypes, understood through the lens of a persons culture.
So to answer your question, by the christian definition, the gods are sinners and the Is All is composed of sinful things. The Greco-Roman gods do an outrageous amount of sinful things in their mythology. The Germanic deitys Are constantly fighting someone, and totally consent to sex outside of marriage. Not to mention the kind of stuff that the aztecs did.
But pagan religions generally do not have a concept of sin. While some things are certainly bad and wrong, they are part of life, like it or not. We like every other animal must fight to survive.