Also, TLR can push on the metal in people's bodies, but only to the point of pushing the body around. Which would still be extremely useful against the Elantrians.
I think you could make an argument for this not working on the Elantrians. Its shown in the book that they do not have normal blood, their blood is a clear liquid. I believe the iron in your blood is mainly what makes blood look red, so I think its safe to say that Elantrians don't possess enough in their bodies for the Lord Ruler to push on.
This is assuming that Aon Edo wouldn't stop the push in the first place.
Its a tough call, we get to see a lot more of how awesome TLR is. While we only get to see minutes of Raoden's power, and really, he's a total noob at it.
Still, I think if Raoden needed to take down the Lord Ruler, he could. Aon Dor is versatile and powerful. Unless you're saying that Raoden is surprised I think he can take down TLR. He can teleport away from an encounter, then send Seons to spy on TLR and pick the time and place of the fight.
With just 3 of the Aons Raoden can teleport, protect himself and destroy just about anything. And he has a lot more Aons to work with. Also, I've noticed that there is a Aon for almost each of the powers of Allomancy:
# Ata (grace, smoothness)
# Daa (power, energy)
# Ela (focus, center)
# Eon (willpower, endurance)
# Ene (wit, cleverness)
# Ien (healing)
# Ire (time, age)
# Nae (sight, clarity)
# Rao (spirit, essence)
# Sao (intelligence, learning)
I don't know if its that much of a stretch to say that Raoden could make himself faster, stronger, tougher, then TLR.