So I have been mucking about with druid quite a bit, they have the most interesting new commons and can really take advantage of the recruit mechanic.
I tried first to make a malygos druid, and that worked OK, I used violet teacher as a midgame tool and an alternate target for oaken summons. This deck has a number of great recruit targets, fandral, greedy sprite, crypt lord, ironwood, violet teacher and king mukla. With the ramp in this deck it is easy to set up an overwhelming board in the early game.
The midgame can really push out some huge turns with fandral and the teacher, and if that fails you still have medivh and your deathknight to grind out a longer game.
This deck wrecks aggro, and wrecks burn mage. It also does suprisingly well against all forms of priest.
It struggles with Guldan mainly, but that can be winnable. I am currently at rank 9 with this deck and it is winning quite a few games. But of course the damn matchmaker keeps feeding me to Guldan over and over.