i agree with you, except that i think the first one is overated and the fourth is underrated.
The fourth one is titanic, and in my opinion, has better themes. The climax is tremendous and tragic, more so than the first, in my opinion. In my opinion, the fourth one is much more emotionally taxing. So yeah that is how i feel, but they're all great pieces...
... in my opinion.
so don't fret over it so much, what matter is it really if a piece as great as these are more popular than the other? You wanna know overrated? Listen to KIIS FM. Watch MTV. That's overrated music.