Most Useful/Game Changing Epic

[zanderklocke]

Cleric is overall probably used to benefit the most amount of people.

However, I think the bard epic completely changes how the class plays. If I had my bard epic, I would be twisting a different set of songs in group due to the fact that now all songs can be made 1.8 times better, when in the past, some songs were not modified at all. On raids I would also be twisting different resist songs and melee fighting as opposed to just standing in the background with a drum.

Are there any other classes that change how they play based on their epic?