Wanting to ally in some War dogs, which ones should I build and how should I equip them?

I mainly want them to be my major tank busters. Advice greatly appreciated! Would it be a problem to try to Nurglify them too? I'm not exactly planning a chaos knights army. Thanks!

Edit to add: I can build a Brigand, Karnivore, or Stalker, and I'm leaning towards the last two.