Rose & Bernard
Locke (I know, Locke's already in Heaven- but I've transferred my loyalty to him to the Smoke Monster now inhabiting his body. Also, I expect him to die- but I don't have to like it!)
Ben (I was only very recently won over to liking him)
That's all!! Aaron could die and I wouldn't really feel anything.
People who MUST die:
Everyone from the Temple (check!!! Thank the Good Lord Above!)
Jin & Sun (to say MUST die is extreme, but I'd like to see at least one of them be shot to death)
Charles Widmore (Please God!!)