Although the musical Scrooge is pretty good too.
George C. Scott is one of my favorite actors, and I thought that he made a great Scrooge (he made the character humorous, which I think is critical), but like many US actors, he never really pulled off a convincing English accent.
For some reason, most top British actors have no trouble at all doing convincing US accents, to the point that a lot of American audiences don't even know they're British, but the reverse rarely works.