McVay winning first seven vs Ariz

I know this is probably nowhere near the record for most wins by a coach versus another team before suffering a loss. But it does make me curious as to who and what might be. Would it be Seifert against our Rams, or did we beat him that first game? Maybe one of the NFC Central coaches against the Bucs when they started out? Or some old school guy like Halas against a team like the Cardinals?