Will soon have enough to craft Sylvanas, had my eye on her for a while. Or maybe Rag or Dr. Balanced

Does Sylvanas fit in Zoolock or Facehunter? I'm a little hesitant on crafting the latter two because of all the BGHs I've been seeing in ladder play, and I''ve already got the fundamentals of those two decks in since I'm poor on dust and can't play the more expensive decks atm. Maybe I'll just craft Dr. Balanced