Avacyn's Pilgrim: Very good ramp guy. And yes, I know
Noble Hierarch would be a perfect fit for this deck, but they're just too expensive.
Birds of Paradise: Awesome ramp, period.
Knotvine Paladin: The main attacker. Plays great with exalted, KoNA and Wilt-Leaf Liege love him, and with a Rancor attached he'll be the main threat to kill.
Rhox War Monk: So good. Can be played on turn 2 and blocks many threats, and Rafiq or the KoNA turn him into a life-gaining beast.
Qasali Pridemage: Arguably a sideboard card, but I always have at least 2 main because many of my friends play artifacts or equipments. Also the exalted helps a lot.
Knight of New Alara: The main lord! This deck is built around him after all. He can enter on turn 3 for a 6/7 lifelink hit with the rhino, a 6/6 flying Jenara, or even an 7/5 trampling Knotvine Paladin + Rancor, which is freaking amazing.
Wilt-Leaf Liege: A support lord. Only gives +2/+2 to the 3-colored guys, but it's harder to kill and helps the 1CMC creatures in exchange.
Rafiq of the Many: Just incredible. As soon as he enters, he turns the angels, the rhinos, or any attacker with a Rancor into huge threats. Also, it can fill your hand with cards via Tamiyo's +1.
Stoic Angel: So, SO good against creature-heavy decks, which is the case of my meta. Also a real danger when combined with Rafiq, KoNA or Tamiyo.
Jenara, Asura of War: So good for 3 mana. Same sinergies as Stoic Angel, and if I have some mana to spare can make her bigger!
Tamiyo, Field Researcher: When I knew this planeswalker existed, it was an instant must. The +1 draws you a lot of cards, controls the combats, and works great with Rafiq, Rancor and the flyers. The -2 can avoid many threats and let you attack with your big guys. And if you get to the -7... Well, you literally can put your full hand on the battlefield for free, usually giving you the game.
Nissa, Steward of Elements: Same as with Tamiyo – love at first sight. Ideally played with X=2/3, but even if played for X=1, I can scry once and on the next turn play almost any creature or a land for free.