A Charlie for myself or Sam? An Amelia for Sam? A Meg to play Pizza Guy with Castiel? A Pam for me to play with? An Ellen for me, Sam, or Bobby? A Mary for John? A plaything for Crowley or Azazel? An Anna for me?
....Just some on my list. I'm sure once I fully catch up with the series there could be more added as well. Feel free to toss anyone at me and we can see what sticks.