Haha. I was thinking about my earth-bender (if I have to do one), and decided that I'd like the guy to have a drawback of some kind. Like Toph has her blindness. Being blind is kind of a thing for me, and I like to explore it, but it felt a bit too much going with the same drawback as one of the original cast. Being deaf could be fun, but would also mean a HUGE drawback... But perhaps a mute... That would be nice. 
Looking at the group dynamic of the five-man-band, I saw this: 
 The Big Guy — (drummer) The strongman of the team. May be dumb. Or mute. 

Yeah...