Jaden Smith
Maybe Bill Gates - but that is a long time from now - mainly the individual behind having everyone with computers in their homes which was the start of the information age much like Henry Ford is to manufacturing
Who do we remember from 400 years ago?
Is there a distinction between "know" and "can know about"?
For example, there are historical figures from 300 years ago that i do not know right now but I have the ability to find out about them.
If we are talking so popular it is ingrained in teaching of history (or other subject matter) and is truly considered general knowledge for the time, very few. Perhaps individuals that we knew about when we were all younger and didn't have to expend much energy to know about them in the first place.
I strongly disagree with Elvis (and Michael Jackson). People usually don't get remembered for 400 years due to the popularity they had and how big they were in pop culture alone. In terms of output and innovation, he really didn't do all that much compared to other greats, and most of the credit that he does get, he owes to the black artists who were among the real pioneers. Not sure his music holds up very well over time anyways.
As far as musicians go, I see absolutely no reason why Miles Davis and John Coltrane should not be viewed on the same level as the raised-on-a-pedestal classical guys, personally. Personally, I think they have a better crack at that than the Rock guys.
As far as filmmakers go, I don't think Spielberg stands the test of time, personally.
David Bowie, the Beatles, and Elon Musk.
I strongly disagree with Elvis (and Michael Jackson). People usually don't get remembered for 400 years due to the popularity they had and how big they were in pop culture alone. In terms of output and innovation, he really didn't do all that much compared to other greats, and most of the credit that he does get, he owes to the black artists who were among the real pioneers. Not sure his music holds up very well over time anyways.
It's impossible to tell, really, because pop culture on the scale Elvis and MJ were at has only come into existence in the past 100 years. The idea of the "household name" is a pretty recent phenomenon, so we don't really have a frame of reference as to whether or not a pop culture icon as ubiquitous as Elvis (who I agree with you on his weak musical claims) will be that memorable.