I am not that up to date/familiar with that many WoW machinimas, but every now and then one comes up that really makes me laugh. I recently stumbled on this video from Wowcrendor where he gives a rundown of class stereotypes. It's pretty good stuff - as are many of his other machinimas. If you wanna skip the palas and the shammies and want to go straight down to the hunter-part, forward to 1.44. And, if you will excuse me, I have a shield to ninja.
Check out other machinimas he's done at his channel.