I was going to say the London Raiders, but really, wasn’t it the Saxon’s who raided England back in the day ... so move the Oakland-LA-Oakland franchise to London and call them the Saxon’s, and you have continuity.
And of course, keep them in the AFC West just for giggles.
The Angles raided when the Britons were native. The Saxons then raided and settled on top of the Angles, then came the Danes. Last, but not least, it was the Normans, who were Vikings settles in northern France.
The Spaniards tried it, but the Armada didn’t make it.