Yes, for at least it's first six seasons, although many later ones were also excellent.Fucking Columbo!
It's entertaing in a period piece kind of way, sure but is it really worthy of number two?
It set standards in writing, direction and Peter Falk's portrayal. And it was always unafraid to use the latest technology and cultural trends as integral to its plots, meaning it was always forward looking and ground breaking in its ideas. It also means that episodes now stand as fascinating bellwethers of the era they come from. Columbos from the early 70s remain genuinely great to watch, and there's not much other TV that can be said about almost 50 years after it was made. The Wire was also groundbreaking and not undeserving of its win, but Columbo is the only other contender on that list worthy of challenging and even beating it.