Suggestions by @gannonczaicki

Steve Schirripa

as Junkyard Guy in Postal 2

Score: +2

Michael Rooker

as Uncle Dave in Postal 2

Score: +4

Ken Davitian

as Habib in Postal 2

Score: +4

Vince Desi

as Vince Desi in Postal 2

Score: +2

Tony Cox

as Gary Coleman in Postal 2

Score: +3

Anna Gunn

as The B*tch in Postal 2

Score: +1

Nicolas Cage

as Postal Dude in Postal 2

Score: +7

Ian McDiarmid

as Warren Harding in The United States Presidents

Score: +1

Richard E. Grant

as Woodrow Wilson in The United States Presidents

Score: +1

Robert Englund

as Woodrow Wilson in The United States Presidents

Score: -1

John Goodman

as William Taft in The United States Presidents

Score: +1

Henry Thomas

as Theodore Roosevelt in The United States Presidents

Score: +1

Gerald McRaney

as William McKinley in The United States Presidents

Score: +1

Michael O'Neill

as Benjamin Harrison in The United States Presidents

Score: +1

James Spader

as Grover Cleaveland in The United States Presidents

Score: +1

Chris Parnell

as Chester Arthur in The United States Presidents

Score: +1

Ben Stiller

as James Garfield in The United States Presidents

Score: +1

David Spade

as Rutherford B. Hayes in The United States Presidents

Score: +1

David Denman

as Ulysses S. Grant in The United States Presidents

Score: +1

Ian McShane

as Andrew Johnson in The United States Presidents

Score: +1