Ninjas might be another possibility? Yuriko, the tiger's shadow makes for a very agressive commander if you build around getting her ability to trigger. she can hit the field as early as turn 2 if you get a 1-drop creature, and this deck wants to run a bunch of cheap, hard to block creatures anyway to get your ninjas in.
Yuriko tends to be a glass cannon against aggro decks. Yes, she come in hard and fast, bringing your opponents' life totals low by flipping things like eldrazi and split cards... but she also tends to have just a few small creatures on the board at any given time until late game (when those eldrazi can actually be cast), and those small creatures tend to be tapped. Yuriko is very vulnerable to crack back.
Two Score, Minus Two or: A Stargate Tail
(Image by totallynotabrony)