just had another thought....
the daggerfall agent did manage to kick off a dragon break.....thats gotta be something right?
But he gets stepped on my the Numidium, and mostly just played the political game instead of fighting divine beings. I guess he could sack cities, but I think any of the heros so far had the capacity to do that also. So if you consider being able to decide who gets stompy bot, I guess.
Still, I'm full on with the Battlespire recruit. He played the daedra like a violin, he endured a constant onslaught of daedra and was behind enemy lines on their turf, had access to a lot of the most powerful equipment, found MD's weakness, didn't have time to curl up in a nice bed, could potentially be the biggest wise-ass this side of Oblivion, and defeated MD 1v1 (unlike Alamenxia). As far as I am concerned, he was at the very least top 2 or 3 of all categories of physical, mental, emotional, and equipment strength. It takes a lot of guts to be a green battlemage to survive an entire invasion in the planes of Oblivion, with very few friends, tons of enemies waiting to shred and devour him, and also outwit each and every one of them without breaking down or dying.
The Eternal champion did have to run around all of Tamriel and visit their most dangerous dungeons, and it took him 10 years. That's 10 years of not falling into despair that you could be too late or too weak, so he/she has a high amount of mental and emotional strength there.
The nerevarine, while physically and magically powerful, was played like a violin. However, in his/her factions and a bunch of quests, he/she could make decisions to benefit himself, benefit someone else, both, and what have you. However, the whole Tribunal and Main Quest was nothing but him being a complete puppet to Helseth, Azura, and the Emperor, often having to opt out of freethinking. Emotionally, the nerevarine had to endure some nightmares and the nightmarish 6th house.
The Champion of Cyrodiil was nothing more than a glorified squire, and being the most brainless hero of them all. If he was told something to do, he did it. If there was a quest to jump off a cliff, he'd do it. Freethinking on his/her part was the most limited out of all the heroes. Emotionally and mentally speaking, surviving Oblivion was his biggest worry, which isn't that bad. However, I'd gander to say the CoC is a very unstable, if not a crazy person, which is coincidentally required to be Sheogorath! This guy was a do-gooder, a heartless murderer, the Grey Fox, servant of the daedra and nine. In fact, I really do believe the CoC is insane! Even before SI!