If that's how you construe 'rape' the concept ceases to have meaning. Nearly everyone would be 'rapists'.

"Known assailant"? Yeah, Assange definitely fits that description.

"Lack of consent"? According to the police reports he got consent. You may disagree with the veracity of that consent, but neither woman accused him of unconsensual sex. They said they didn't consent to sex without a condom, but their actions said something entirely different. That makes the argument for 'rape' completely and irreducibly political.