In 2016? Obviously Hillary, because she'd be accountable to the modern Democratic base and Congressional delegation, while Ford would be accountable to the modern GOP base and Congressional delegation.
This.
Even actual moderate-to-liberal or outrigh liberal Republicans of the past would be accountable to the modern GOP base. The same with those very few remaining "moderates" of the present.
Hell, if Grover Cleveland were President now, elected as Democrat, he'd be governing according to the modern party's demands.