R&B? Depends.
For white bands, it would have to be Stones.
BTW, I don’t know how your song list is R&B.
Gallows Poll, for example, is actually an old English folksong. Others have covered it, for example Steeleye Span - “The Prickly Bush”.
>> BTW, I don’t know how your song list is R&B.
C’mon, you know R&B is used as a generalization to describe the kind of rock both Zep and the Stones recorded. Whatever the true definition of R&B, both groups are in relative proximity to it.