Kamala Harris / Sherrod Brown would essentially recreate the Obama / Biden ticket by having a charismatic African American liberal and a white working class Democrat on the ticket. I think that would be an excellent ticket that could drive up turnout among coastal/urban whites and minorities while also reaching out to the white working class.
Sherrod Brown is white working class? Or do you mean that in a cultural sense? (whatever that would mean...)
He appeals to the white working class in the same way that Joe Biden does.