Since I don't want to clutter up the forum, here's 4 PODs that I had in mind in the same thread. WI any of these had won the Democratic nomination in 1960 and then defeated Nixon:
1) Hubert Humphrey
2) Lyndon Johnson
3) Adlai Stevenson
4) Stuart Symington
Well, my personal preference will always lean towards HHH, but there's a way to do it with all four.
HUMPHREY - Humphrey carries the primaries instead of Kennedy and uses this impetus to gather endorsements from powerful anti-Kennedy people such as Stevenson and LBJ. Granted, he would have a hell of a road to overcome but if he took the primaries he needed to take, he could've done it.
JOHNSON - He needs to control the traditional Democratic machine. He needs to keep the compromise negotiated by bosses like David Lawrence from happening. With that, he has a good track to the nod.
STEVENSON - He just has to express an interest in it. Stevenson, though would be approaching old hat at that point and this would be his last chance either way. He just needs to say that he wants it and he could beat Kennedy.
SYMINGTON - As a compromise candidate would be his best chance to get in. Not exciting and gray-haired, Stu Symington would have to get in by way of a deadlocked convention, or some long protracted negotiations.