[dinofire]

Obvious ones:
Mark: If it wasn't for you guys, I'd probably be food right now.

Larry: I plan to around, long after you're gone. And if you DO turn, I'll be the one to put the axe through your head

Kenny: You don't just end it 'cause it's hard. You stick it out, and help the folks you care about.

And Clem giving you a weapon to kill a zombie at the start, and you giving Clem a weapon at the end.

Lee starts and ends close to a zombie police officer

Also, to add to the babysitter thingy: You kill a zombie babysitter, only to become one yourself (if you left Lee)