Battle ragers do work well...
My personal favorite, currently is my Alchemist Gnome. He has all these great potions. Light e fuse, say "Excuse me" and throw. He lands and ignites: POOF ! Then, he runs around in the midst of the enemy, still on fire, causing all kinds of havoc.
And, he actually BELIEVES me when I say it was an accident. You'd think he'd figure it out, with the same accident happening EVERY BATTLE...