Film's Most Charismatic Actor?

I refer to Marlon Brando and I turn for evidence not to his famous turn in The Godfather (one of my favourite movies but one where Brando goes a tad over the top) but to two monochromatic performances in 1953 and 1954 respectively. The second of these even has learned nominations as the greatest cinematic performance of all time.

Julius Caesar was the first Shakespeare I ever studied seriously (O Level) and it has a chapter to itself in my doctoral thesis. The play is not, I have decided the 'broken-backed thing' derided by some critics. Yes Caesar gets bumped-off barely halfway through the text, but the play fair rattles along and gives us, particularly in Brutus and Antony, plenty of politico-drama to get our teeth into. The 1953 film is loyal to the text and James Mason makes a persuasively priggish Brutus. I am never quite sure about John Gielgud (this, I accept is probably my problem) but he enunciates Cassius's lines beautifully. It is, however, Brando who muscles his way to the foreferont as Antony. A highly resepctable adaptation. 70/100. 

Brando's work in On the Waterfront is on an altogether higher plane. This is a magnificent film, ornamented with a slew of notable method-acting tours-de-force - take your pick from Rod Steiger, Karl Malden or Lee J. Cobb, but you will eventually be brought back to Brando as Terry Molloy. It is a gift of a part but what Brando does with it is breath-taking. The movie lasts barely more than ninety minutes but satisfies on every level. 93/100.