Which is funny of you to say because she's actually been on a TV series for four seasons now - The Secret Life of the American Teenager. I don't think she's the star-star, but from what I understand, she has a fairly important role. (As the mother, I believe?)
But TV has changed. Wrestling has changed. The world has changed. There were a lot less options in the '80s when Hogan ruled the roost.
I think it's safe to say that more people know Hogan than Ringwald, just because of how distinctive he is, like you said, but also because he's had a much longer shelf life. Ringwald was big for a short period of time in the '80s and is experiencing a comeback now (if you can call it that), with very little in-between that garnered any major public recognition. Hogan, meanwhile, was on or near the top for 2-3 decades straight. More people had more chances to know him, even if Ringwald's '80s output is as "immortal" as Hogan's character. Still, the general public probably doesn't respect him the same way they might respect Ringwald. (I'm not saying Ringwald is Meryl Streep necessarily, but I'm willing to wager that people generally feel more affection and admiration for Ringwald than Hogan.)
The problem with your data is that it relies solely on 1980s box office numbers. Even in the '80s, movies had a shelf life outside of theaters. Cable and VHS rentals made so many of them big past their theatrical run, including the John Hughes movies. The Princess Bride is another good example of that. That has since continued with DVD, Blu-Ray, Netflix, etc.
Are you seriously going to tell me with a straight face that Witness, Out of Africa, and Cocoon are more enduring and beloved than the John Hughes films with Ringwald, or even the ones without her like Ferris? Crocodile Dundee was a major hit at the time, but it hasn't had the same staying power. It was a huge fad, almost like Hulk Hogan. But I don't think anyone outside of the '80s really knows or cares about Paul Hogan (the Croc actor).