Keith might overtake Thatcher, purely because his crimes are on a constant drip feed into my eyeballs, rather than historical memory. It'll be a tough call though.

Very likely, consider - Thatcher never made any pretence of being anything other than a raging Tory monetarist roaster while Keith still asserts he's a "progressive socialist".

I guess the only thing that might work in Keith's favour is that there's a hell of a lot less to destroy in the first place.