Yes, I think Eomer was extremely good. I still think Sean Bean would have been okay as Aragorn. He’s a very experienced actor who’s been successful in a variety of roles. Whether he (or anyone) would have been better than Mortenson, nobody can say, since it wasn’t done that way.
But, Aragorn doesn't die in this movie, so he couldn't have been played by Sean Bean.
Sigh. Sean Bean could NOT be Aragorn. His characters always have to die.
Sean Bean death reel - YouTube
www.youtube.com/watch?v=4sGR1-Wgo1M
That being said, Viggo didn’t do it for me as Aragorn, either. Eomer was perfect.