Physically and artistically - the Peter Allen role in THE BOY FROM OZ. Hugh Jackman is on that stage for practically the whole time, sings about 20 songs, shows his different dance moves ( tap, latin, bump and grind, Rockette high-kick, ala Fred Astaire, etc.), acts out a wide range of emotions - from very poignant scenes to comedic instances and to great celebratory moments... Plus, can you dance down a staircase while playing the maracas, singing, blowing the whistle, and swinging your hips to the latin beat???
The only effort he doesn't have to do is to be charming and sexy

But for all his efforts onstage every night - he deserves the TONY!!
Jo