Beast Druid will be strong no doubt. This quest seems quite easy to activate as well.
Once active simply dump your hand then reload.
Menagerie Warden Is worth 2 triggers
Celestial Dreamer Has flown under the radar and will be strong with your big minions, I believe it will trigger the quest as well.
Genzo, the Shark Has 5 attack and can help you reload to draw cheap minions.