I really don't think there is. And believe me, I've heard lots. Perhaps there are some animes that have more epic music? But I don't know where to "acquire" the OST's for anime, though :(

So, is there anything really more epic?

Serenata choir ver. by immeadiate music though that is cheesily epic, but still pretty damn epic.

http://youtube.com/watch?v=cYEkTXL691Y

The Miracle from xenosaga I is also a decent stab at more epic.

The final battle with margulis in the third xenosaga was a pretty epic tune too.