I think that more likely than not, they will be remembered. This Rolling Stone list https://www.rollingstone.com/music/music-lists/100-greatest-artists-147446/stevie-wonder-4-29070/ ranks them at number 14 of the hundred greatests artists. Almost 51 years has passed since Led Zepellin's first album came out. So I'd think in another almost 50 years there will be more newer artists on those type of lists and some of the older artists dropping off. Happens with just about every kind of list (e.g. NBA players).
Everything of course hypothetically can be debated. Happens with sports and other things. Personally, I just don't see anyone on any of lists so highly rated be gone completely in 50 years.