In this thread I'll be showcasing the awesomely powerful RPG sniper that is
Sparky Sparky Boom Man Combustion Man.
In terms of raw power, Combustion Man is easily top five in the verse (excluding AS, DAS, and bloodbenders). Some say he isn't versatile, but that hardly matters when your casual blasts are building-level explosions.
Here's a couple of stills from the same explosion showing more details than the gif does:
Other Bending Stuff
While CM's style is focused around his immense power, that's not all his bending can do.
Physicals, Hand to Hand, and Intelligence
While CM doesn't have a huge number of physical feats, the ones he does have paint him as a physically imposing, nigh-indestructible bruiser.
As far as intelligence goes, he was able to track down the Gaang multiple times with very little information, and set a trap for Katara and Toph that came within seconds of succeeding (he was about to blow up Aang when Katara intervened).