Sherrod Brown/Kamala Harris
This, and most emphatically not flipped tyvm. Harris would be way to SJWy against an above water Trump. She cannot and will not win back the rural midwest.
Black turnout would be a likely counterweight to that. No way would she do worse than Hillary, Kerry, or Gore in that regard.
And since pretty much no one on the D side could contest Hillary on artificiality, the odds of Trump making even more significant gains with his base are nil, Michigan, Wisconsin, and Pennsylvania would be liable to flip with all the cards played right.
That said, the risks are far greater banking on that.