Frodo would have been screwed without Sam.but more importantly, I think Sam is the real hero of the story. Frodo had to carry the ring, but Sam carried Frodo.<--Samwise IS the real hero of the story according to Tolkien.
"I wish it need not have happened in my time," said Frodo. "So do I," said Gandalf, "and so do all who live to see such times. But that is not for them to decide. All we have to decide is what to do with the time that is given to us." ~Lord Of The Rings