RE4 clearly has proved its worth more than MGS3 has so far. Looking at their matches, RE4 looks convincingly stronger to me, too. Compare them yourself.
For the unranked undefeated games, I would rank them in the following order:
1)Mega Man 2
2)Twilight Princess
3)Assassin's Creed II
4)Path of Radiance
--
"Ah, a party! We haven't had one of those. So...what is a party?"
"Well, you drink punch and eat CAKE! ...I think."