I think we had this question before. I nominated Russell Brand. They've both gone loony (Morrissey mildly, Brand wildly) since the 2009 interview, itself a good one, and I think in a new encounter they could potentially feed off each other's socio-political craziness. You'd have a good chance of it going into "Alice-Walker-endorsing-David-Icke" territory for one if not the both of them. But really, anyone outside the Dodwell/Rayner axis would be a blessing.
Second choice: Johnny Marr.