I grew up in the same home town as Jimmy Stewart, and am heavily biased toward him as the greatest all-time Hollywood actor, but I still have to tip my hat to “Man Who Would be King” for best movie.
I put Jimmy Stewart in my top three actors, but if someone really pushes me to settle on one number one, I choose Jimmy. Besides being a great actor he was a patriot, a humble man and as far as I know never gave in to the temptations of Hollywood.