[Harp-L] List of harmonica players who have achieved becoming millionaires?

[Hellerman, Steven L.]

All depends on the definition of "harmonica players".

Off the top of my head, these are at the top if the definition is broad (anyone who has ever played harmonica on a recording or live on stage):

Mick Jagger (has his own harmonica brand)
Ron Wood
Bob Dylan (has his own harmonica brand)
Bruce Springsteen
Neil Young
Dolly Parton

John Lennon and George Harrison also played on recordings or live or both.

Anyone else?

Does Taylor Swift play at all?