Chloe came in year 4, I believe.
All Jack’s bosses… dead.
All Jack’s cronies… dead.
If Kim ever makes a reappearance (or if Tony comes back from the grave :P) she’ll be it.
I’m just gonna take this time and say boooo for deading Curtis, he was a good character. But, after last season, anyone’s fair game.
OH! What about the special agent, bodyguard for Palmer 1?