I've always said UW/UO is the closest thing to an SEC hate rivalry. I've never said it was the same as one. As for the relative intensity as measured by stupid people doing ridiculous things, ok, the southeastern US wins. As for the level of acrimony, I'd say UW/UO has nothing to apologize for. There is sufficient hate there for the average fan.
Also, not every rivalry in the south is as intense as Iron Bowl. The Florida/Georgia rivalry is not more jacked up than UW/UO IMO. Lots more drinking, sure. But do they hate each more than we? do? I don't think so.
To me, the mother of all rivalries is Michigan/Ohio State. That game truly matters to many people regardless of the situation. I want to attend that one before I kick the bucket.
Don't forget Texas/OU (they aren't SEC yet). That and Ohio State/Michigan are the two biggest legit shutdown entire states to watch a football game rivalries there are.