Oh god no! Not another Frodo, Harry Potter and Frodo, two main characters I loath
Frodo is neither Gandalf nor Aragorn. He's not powerful. He's not magical. He has neither a connection to divinity nor legions he can call to pave his way. He's not royalty. He's not slick nor sleek. He's not sexy in any way. But Frodo perseveres through tribulation.
It can be argued that all heroes persevere, but in my opinion most are too young to appreciate the sacrifices they're making and too young to really be afraid of failing. Frodo is fifty years old when he sets out for Rivendell. He fully knows he may never come back. He's casting away his chances for love and a family.
In the end, Aragorn, Belgarion, and I suspect Rand al'Thor all sit enthroned in power and showered in love. Frodo retires to obscurity with severe physical ailments. He gave his all and was only respected for it by a select few.
The example of Frodo is to do what is right. It did not matter that Frodo knew of the prophecy of the Halfling. He was beset by traitors, spies, undead, and the Dark Lord all bent upon his failure. He just had to do what was right... what was entrusted to him day by day. That was his power. He could not use Anduril. He did not have the Horn of Gondor nor the Bow of Lorien. He did not posses the Narya, the Ring of Fire. He possessed a friend... a gardener. Together they just did the one thing they were supposed to do... step by step, day by day.
In contrast, Jon has Ghost. Jon has Longclaw. Jon is the Lord Commander of the Night's Watch at age sixteen or seventeen. Jon may be the secret son of the Dragon Prince. Jon has offers to make him Lord of Winterfell. Jon has an offer to marry a gorgeous princess. But Jon seems to be set on doing the right thing.
Mayhaps the better comparison would be Jaime. Jaime has everything Frodo does not... everything. He's sexy. He's a demon with a sword. He's fabulously wealthy. But Jaime's a huge failure. He never does the right thing... except one time... and it earned him everyone's derision and it earned him his nickname.
Frodo's not sexy, but he's what a hero should be.
Shack, I agree that the longer the story, the more time an author has to develop characters. This appeals to me greatly. Even though I don't like Jon, I like his POV's and... he intrigues me. For all his upbringing and success, he's been wounded physically and emotionally. Jon's decision to ship Gilly off with Mance's son was the first thing he's done that tells me he may not be straight out of the cookie cutter. He's starting to be faced with greater levels of decision making... sort of like Eddard was faced with Lyanna. I don't want to see Jon end being Eddard II... I'd like to see him more politically adept.