So I'll tell you about the last event I went to, on Thursday. It was MacHomer, a one-man show by a very talented Canadian called Rick Miller. He did Macbeth as played by the Simpsons characters, aided only by a screen behind him showing cartoons or background scenes, plus his amazing talent for voice mimicry.
MacHomer - Homer ("Is this a dagger I see before me--no, it's pizza...mmmmm, pizza!" and "They've tied me to a stake! Mmmmm, steak!")
Lady MacHomer - Marge
Duncan - Mr Burns ("Eeeeexcellent!")
Malcolm - Smithers
Banquo - Flanders ("Bank-woe is me")
The Porter - Krusty the Clown
MacDuff - Barney (drinking Duff beer of course)
My only criticism is that it was very fast and condensed, and was only an hour long. I wanted more. Miller finished with singing "Bohemian Rhapsody" with 'the most annoying voices in music' (I was glad to see my top contenders, Bob Dylan and Elvis Costello were right up there) then "We are the World" as various Simpsons characters.