I 'll put money on the God Father himself , the likes of Sammy Davis Jnr , David Lee Roth ( solo ) and Blood Sweat and Tears missing at the starting gate in this BMC.I think you are right that some big beasts will be missing. I wouldn't be surprised if someone like Otis Redding or The Four Tops fail to make an appearance. I wish I'd put OR on my list which was tbh a bit random. We are light on a few genres so far but early days hopefully.
It's also been interesting to see the mix of people choosing big hits vs others picking relatively obscure or lesser known songs.
Now that some line up missing and I haven't even started.
Don't think we have has any of the artists that appeared at Woodstock appear yet either.
Surely The Who will get a gig.