To clarify, Bard's are mostly awesome cause they do great damage to the undead... actually that's an understatement. Their song's rape and pillage the undead until their souls beg to be sent back to oblivion rather than continue to endure the torment that Bard's can do to them.

Seriously though, there are two dungeons where a party of Bards can waltz in and wipe the floor with mostly everything in there, including the boss.