Can you think of any others?

I was a bit surprised a few years ago when Nina Simone popped up in some pop-culture media (maybe a TV show?). I think she is sometimes used in other vehicles, even if people aren't buying her albums. She died in 2003 (age 70). YouTube: Feeling Good (Nina Simone - Topic)

I'm not sure the ones you listed -for the most part- were really unique. Ella, Nat, maybe Aretha...they still seem to get play time on the radio. They were popular in their time, of course (Dinah, Doris, etc). But I wouldn't expect any of them to endure. They don't seem to have had a 'hook' that could pull them forward into the future. Same with the K-Pop phenomenon today...20 years from now, they will be mostly gone. Replaced with new "pop" ('pop' being short for 'popular'). The stuff we regard as "classic" seems to have more staying power.

Elvis continues to endure (even though I'm not really a fan...his stuff is "OK" to me, but I don't any discs/albums). He was revolutionary, though not as inventive/experimental as future groups.

I agree, "we'll see". I would think some performances will survive just because they're that good. Iconic. You almost can't remake them without a lot of fallout from potential audiences. Well...maybe we won't see. As you said, we're getting up there (me faster than you, I suspect, since you just had a baby a few years ago...1poorlady and I are well beyond that possibility). Maybe your grandkids will see.