You and Elihu (below) touch an important fact: most players can't write, and many writers can't play. Willie Dixon was a fine bass player, not really a front man, but the greatest composer in blues history (and yes, I put him above RJ). He could write deep and mean or fun and playful. He wrote songs musicians and listeners enjoyed.
In the 60s, when blues became an "art form" to be filled with extended guitar solos, the idea was rejuvenated but a lot was lost. We're all indebted to John Mayall (and thus, Clapton) but now that we don't take acid and need music to watch the colors by it's important we try to remember how to write a song.
Why not a piano player that sings like Ray Charles, plays like Oscar Peterson and writes like Willie Dixon? What I’m trying to say is that we need someone who sings, writes and plays with ability that excites and inspires people. And that might be someone who melds blues and hip hop.