I recall some talk about Whisper, but I've got to sing her praises. She's infinitely better than Junktroller.
Since she's independent of Grenzo, she can help hold up mana in exchange for spent etb creatures, and her sacrifice cost means she is part of another infinite combo win-con.
Whisper, Blood Liturgist + Thornbite Staff + Creature that Makes 3+ Bodies + Any random dork in grave.
If the Army-in-a-Can creature is Marionette Master, you win alone through her damage. Siege Gang provides infinite 1/1 goblins. I also have Mogg War Marshal in my own build, which means he wins the game depending on who your random dork is (still oppressive if it doesn't win). Kiki/Phyrexian Delver/Puppeteer Clique can pull bad impressions of the bodies depending on what's in who's graves.