Who is the Earth Bender in the OP? In the opening of Avatar: The Last Airbender when we see Benders of each element we see that

Air = Aang
Fire = Azula
Water = Pakku

but i don't seem to recall who the Earth Bender is. they look too manly to be Toph and loo too young and sane to be Boomi. so i am wondering who is this Earth Bender
His name is Sud

Just compare this images





btw he was the first result in google search :)