Well, since the Packers have been around since 1919, and the Vikes since, what...1960? I suppose it would have been tough for the Vikings to win anything over those 41 years. More like 5-1, which is still significant even though few pro teams in any sport have much success in their first few years.
Look, there are lots of ways to quantify the success of a given sports team, but to include victories that pre-date one of the teams in discussion seems kind of silly. The Packers have had plenty of success, but success is not only measured by championships alone.
For example, I have always admired the strength of the Packers organizational design. Owned by the fans, so to speak (even though they don't get a dividend on their shares), but at least the team doesn't threaten to leave every time the stadium needs shingles. That beats the holy hell out of billionaire owners like Jerry Jones, and a few others I can think of over the years.
Nonetheless, when it comes to being a bore, there are few teams out there with fans that compete with the Packers. I suppose Cowboys, Seahawks, Eagles, and maybe 49'ers compete with the best in that category.