Yeah I think there is no doubt they can be great, or at least great-ish. I think it should be uncontroversial to say that The Walking Dead has at the least moments or stretches of great-ishness. Another fine example of great-ishness is Train to Busan. If you haven't seen TtB yet, do yourself a favor and see it. If TtB does not move you, then check to be sure you're not a robot.
And there are others worth mentioning.
I would suggest the good thing these examples get right, as so much of storytelling in general is about, is their theme, which is: the importance of family and friends and sticking together.