Re: Who deserves the most credit for MCU: Phase One success?
I'd also say it's a team effort. Feige had the idea of the MCU and the courage to bring it to life, RDJ for his incredible performance as Tony Stark, Favreau for giving us a great first Iron Man movie as kickoff, Whedon for the highlight of all this.
And even all the other directors, writers and main actors for hitting the tone of the MCU and making successful movies about the other heroes.
MARVEL CINEMATIC UNIVERSE: PHASE II
IRON MAN III - THOR: THE DARK WORLD - CAPTAIN AMERICA: THE WINTER SOLDIER - GUARDIANS OF THE GALAXY
AVENGERS: AGE OF ULTRON