Ralif Redhammer
Legend
Name recognition matters. Showing countless people (since Netflix is generally chary of giving viewership numbers) games of D&D on screen matters. In the words of Mr. Clarke, "Once you open up that curiosity door, anything is possible." If Stranger Things is not in your top 5, I'm curious what would be? I wouldn't list it as number 1 (for that I'd put the designers' work itself - Stranger Things' publicity wouldn't matter for much if the game itself wasn't good), but I certainly would put it in the top 5, personally.
I just don't buy it, because knowing those names has absolutely no bearing on wanting to be involved with a fairly wild hobby. The vast majority of D&D players have never played games directly involving Demogorgon or Vecna, I daresay. Perhaps not even indirectly. I know huge numbers of Strange Fans things in my friend group and through work, and let's be real, they don't even see those as D&D names for the most part. They see them as Stranger Things names, and they're kind of right to. Cuts the other way even - one of my friends who has played D&D for 30+ years didn't know Vecna was a D&D name until the most recent season of ST came out! We've never played Greyhawk or run any of the adventures where Vecna might turn up so...
I very much doubt it's top 10, let alone top 5.