I'm making a WC3 mod that's all about classes you usually don't hear about/get to play as, or just classes that aren't very frequent in general. Here's some examples:
Monster Mage: Much like a Blue Mage from the Final Fantasy series. The Monster Mage's hero abilites is those that normal creeps use like War Stomp and Entagling Roots.
Trader: Can make business deals with enemies making them fight for you permanently (see: Charm) and can create tents as well as transport his fellow allies (he is the fastest class in the game).
Time Knight: Much like a rogue tank in WoW: Strong brute guy that is all about dodging enemy attacks and slowing them down as well as making allies faster.
I could use some more interesting classes, so if you have any ideas, post them here, and don't forget to say what role the class has and what defines it etc.