Daniel Craig starred in the most successful Bond film
Skyfall was the most successful Bond film because it was successful in the box office and also praised by both fans and critics. This success is due in large part to Craig and his acting.
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The Bond franchise is one of the highest-grossing film series in history. To date, Skyfall has made the most money at the box office of any Bond film.
Unusually, not only did Skyfall gross the most, but it also sat well with fans and critics, an unusual achievement for a film. Sam Mendes, the director, is masterful and his shots have cinephiles purring. As the man at the heart of it all, and a performance worthy of Britain's favourite protagonist, Daniel Craig deserves a significant portion of the credit.
The film's plot makes no sense. For all of its great action scenes and great performances, the story is lacking and there are glaring holes in the plot. Why does M let Bond return to the field even after he fails the necessary psych and physical tests? Why does Silva not use his hi-tech cyber skills to get to M, but instead hatches a basic plan to shoot at her in the Houses of Parliament? Why does Bond feel the need to return to his childhood home in Scotland? Why does Bond take M to a remote mansion for safety? Why is he the only one protecting her? Why, instead of enlisting the army, Marines, or other MI6 agents, does he rely on an old groundskeeper for armed support? 
[P1] Daniel Craig starred in the best movie. [P2] Therefore he is the best Bond.
Rejecting the premises
[P1] Skyfall was not the best Bond movie.