Suggestions by @nickkaye

Leslie Howard

as Salvatore Tessio in The Godfather (1942)

Score: +1

Ida Lupino

as Constanzia Corleone in The Godfather (1942)

Score: -1

Dwight Frye

as Fredo Corleone in The Godfather (1942)

Score: +1

Ray Milland

as Captain McCluskey in The Godfather (1942)

Score: +1

Dan Duryea

as Tom Hagen in The Godfather (1942)

Score: -2

Claude Rains

as Vito Corleone in The Godfather (1942)

Score: 0

Broderick Crawford

as Peter Clemenza in The Godfather (1942)

Score: -1

Michael Chiklis

as Don Tommasino in The Godfather Duology (2012-2014)

Score: +2

Robert Downey Jr.

as Morris Greene in The Godfather Duology (2012-2014)

Score: 0

Aaron Paul

as Albert Neri in The Godfather Duology (2012-2014)

Score: +1

Dave Bautista

as Luca Brasi in The Godfather Duology (2012-2014)

Score: +1

Oscar Isaac

as Frederico Corleone in The Godfather Duology (2012-2014)

Score: 0

Mark Strong

as Salvatore Tessio in The Godfather Duology (2012-2014)

Score: +1

Dylan McDermott

as Emilio Barzini in The Godfather Duology (2012-2014)

Score: +2

Ray Liotta

as Emilio Barzini in The Godfather Duology (2012-2014)

Score: +2

Tim Roth

as Emilio Barzini in The Godfather Duology (2012-2014)

Score: +2

Alec Baldwin

as Emilio Barzini in The Godfather Duology (2012-2014)

Score: +2

J.K. Simmons

as Jack Woltz in The Godfather Duology (2012-2014)

Score: +3

Bryan Cranston

as Jack Woltz in The Godfather Duology (2012-2014)

Score: +1

Mark Addy

as Peter Clemenza in The Godfather Duology (2012-2014)

Score: +4