Hearthpwn

I played this list from rank 2 to Legend when Menagerie Warden was released. I think I only lost 2 games in that stretch, would would mean I was 12-2 with it. Not a big sample size, but my list seemed good. I was influenced by a Thijs stream in which he declared "probably no Savage Roar," ran Violet Teachers, and included Deathwing, although my list is a little different.

A few notes on the cards:

-no Savage Roar: this might not be the right choice, I'm not sure, but I wanted a list that was consistent and wouldn't run out of steam, so the lack of Savage Roar, which is a situational card, moved it in that direction. The list does have Power of the Wild and Ragnaros, which potentially provide some reach toward the face. I also didn't run Mulch, which made me more vulnerable to Flamewreathed Faceless. I didn't think I had room for it. 

-Menagerie Warden: They're good, but I'm not sure this is actually as super-broken as people thought it would be. I think it fits well in the deck and is occasionally extremely powerful. But I think Beast Druid is very strong not because there is one overpowered card, but because there are finally enough pieces to make it come together (Enchanted Raven, Mark of Y'Shaarj, Menagerie Warden, Curator).

-Enchanted Raven: These are good because they give you four 1-drops to help manage the early game against fast decks, they increase the likelihood of being able to cycle with Mark of Y'Shaarj, and they cheaply fill out the curve without being pingable. I saw that some people were cutting them, but I think they are good and should be in the deck. You just need to take measures in other areas so that you aren't prone to running out of steam due to having a lot of early game.

-Violet Teacher: I wasn't planning on running these at first, but now I think they are very strong and are good enough to warrant diluting the beast theme a bit. Innervate->Teacher is often game-winning because you make tokens before they can effectively contest it, and that extra board presence carries you into your strong mid-game turns. The ability of these to sometimes dominate games on their own really makes them worth it. And there are enough spells in the deck to make tokens with them in natural, non-wasteful ways.

-1 Savage Combatant: I think this is a pretty good card and I wanted another beast, but their impact is inconsistent so I thought only one might be good. It seemed fine to have one of these. I chose this over Fandral as a third 4-drop. I didn't think it would be great to have Fandral in addition to the Violet Teachers in this list. For example, Violet Teacher gets only 1 less bonus token than Fandral does when casting Living Roots for damage, and the Teachers are more broadly applicable. Fandral + Wrath is very powerful, but I thought I'd keep the web of synergies simpler by leaving him out and adding an extra Beast which is also a good target for Menagerie Warden.

-Power of the Wild: I chose this over Druid of the Saber for the sake of Violet Teacher synergy. It was probably worth it, since the Teachers worked very well and because I'm not running Savage Roar, which works very well with Sabers.

-6 5-drops: A lot of 5-drops, but they all seemed too good to cut. Azure Drakes are so good in Druid decks that run the 6 damage spells, they fill the need for card draw, and they work with Curator. Druid of the Claw is just the best all-around Beast, and is versatile. Tigers are very good for Menagerie Warden combo. If I were to cut one of these six cards, it would probably be a Tiger.

-Curator: I think this is a big reason for considering Beast Druid over Token Druid. It puts big card draw back into Druid, and the fact that it has taunt is a nice bonus.

-Ragnaros: I was worried about running out of steam and I wanted something that could burst in the absence of Savage Roar. I'm not sure how good he really was. I remember one game where he was a big factor. But he makes sense in the deck. I think he's probably good and it was just variance that made him not a big factor.

-Deathwing: I wanted another dragon and it was either this or Onyxia. I wasn't very confident that Deathwing would be the right choice, but it won several games. He seems to fit well in Druid because the class doesn't have good come-from-behind mechanisms, and you can get to 10 mana even against fast decks due to ramp. This is in contrast to my experience trying to run N'Zoth in Hunter, when I was never getting to 10 mana in a state where N'Zoth was meaningful. Also, a 10-mana card that clears board is more playable against fast decks than one which reloads your board as N'Zoth does. Deathwing is best when you are running on empty (although he did win at least one game when I was desperate and innervated him out against Zoo on turn 7 or 8 with a bunch of cards in hand). I found that the deck tended to be feast or famine about how much steam it had left in the late game. Some games I'd be out of cards pretty quickly and hoping to top-deck big things, and others I'd have more cards in hand than I could play by the end of the game. I'm not sure what that says about the deck. Deathwing won multiple games though. He can win games from positions where playing a couple of 5-drops would not do it. So I think he's good.

Overall, I think Beast Druid is stronger than Midrange Hunter right now while having some similarities in play-style, because it hits the mid-game earlier, works well with Violet Teacher (which is a very strong card) and makes very good use of Curator. It doesn't have a power-play on the level of Call of the Wild (unless you draw and have time for a Tiger into Warden sequence, but that is rare), but its strengths make up for that.