Without a doubt, Hugh Jackman. The man was heads and shoulders above everyone else in the realm of accomplishments this year.
If I had to name two other people, I'd say Raul Esparza and Michael Arden, for upping the amount of exposure and recognition they've received this year; recognition that goes beyond any one role they played (ie. over the course of a few months, Arden has become a well-known name as an actor in Bare, a composer, a concert singer, and now has landed the title role in Pippin; Esparza has established a strong reputation as a versatile performer).
BlueWizard's blog: The Rambling Corner
HEDWIG: "The road is my home. In reflecting upon the people whom I have come upon in my travels, I cannot help but think of the people who have come upon me."