ESOC official channel : The official channel of the ESO community, all tournament and SaturdaySmackdown games are streamed here
ZutaZuta : ZutaZuta casts tournament matches and Saturday Smackdown games he often casts alongside Interjection (hence the name Zuterjection) and is known for his love of, and skill with, the Japanese
Interjection : Interjection is the most watched and subscribed too aoe 3 streamer! Like ZutaZuta he casts tournament matches and SaturdaySmackdown games and the two have formed a legendary casting partnership. On top of this he sometimes streams speedruns of the Aoe 3 campaign and he plays Hearthstone and more recently Runescape Chronicle. His favorite civ is the interesting if somewhat under powered Spanish civilization
Aizamk : Hailing from the far east, Aizamk is known for disregarding the meta and coming up with strange and interesting builds, often surprising even top level opponents! He often streams 1v1 games but occasionally plays team games too
Tibia : Tibia is strong team player and mainly streams 2v2 and 3v3 team games. Does some nice dragoon age 3 with France and Portugal and also some good sea booms
VeniVidiVici W : The 3rd placed player in the spring tournament. Although he doesn't stream much anymore you can check out his Youtube channel for some analytical, informative, high level games. He also has a guide for new players which you can download here