If the choice had been...
[Save Ben] V. [Save Kenny]
[Save Ben] V. [Save Omid]
or well.... really...
[Save Ben] V. [Save anyone else not actively trying to kill you]
... I think Ben would have died in my playthrough. He is more of a liability than anyone else in the party, for reasons discussed in detail above.
But given [Save Ben] V. [Drop his Ass] as choices... throwing away a life didn't seem like Lee's style. Not how I play Lee, anyway.