How about FIRE/DRAGON. I can't recall if we've had a FIRE/DRAGON type yet, which would kinda make sense!
I would agree with this if it weren't horribly broken for a starter. Basically, unless they introduce dragon types/moves into the game veeery early, you're looking at a Pokemon that is normal or highly resistant to everything not Dragon type.

And I'm with Harruhy. Seriously, I don't mind the mixtures or types, they just have to look kickass. Gen IV was surprisingly good with both though.