I guess Frodo is the main hero. He is left the ring and is forced to leave his home. His shortcut through the old forest nearly kills the entire party until he's rescued by Tom Bombadil. He then nearly dies in the barrow until he's rescued again by Tom.
He doesn't know what to do at Bree until Strider helps him. He succumbs to the temptation to put on the ring at Weathertop and then becomes a burden to the rest until Rivendell.
He doesn't know how to get into Mordor until Gollum helps him. He gets stung by Shelob and captured by orcs and it's only because Sam took the ring that the whole mission isn't blown.
He runs out of strength climbing Mount Doom and again he's saved by Sam carrying him. When he gets to the Cracks of Doom he fails to destroy the ring and is saved by Gollum attacking him.
And even back in the Shire, he can't settle and ends up leaving.
He's just not a very heroic figure and more affected by circumstance, continually requiring rescue. Maybe a bit more like Arthur Dent than it first appears. :)