I'm going to present you the list of cards, starting from the best pick during the draft and ending on the least desirable card. For instance, if you don't have any card from "2nd pick" card pool you look for cards in "3rd pick".
Cards not mentioned below shouldn't appear in your deck.
Notwithstanding, cards like vanilla creature 2/2 for 2 mana are as well essential in your deck in order to be able to stop early threats of your opponent.
1st pick:
White: Monastery Mentor, Daghater the Adamant, Citadel Siege.
Blue: Torrent Elemental, Shu Yun, the Silent Tempest.
Black: Archfiend of Depravity, Mardu Strike Leader, Tasigur, the Golden Fang.
Red: Shaman of the Great Hunt, Alesha, Who Smiles at Death.
Green: Whisperwood Elemental, Warden of First Tree, Yavosa Dragonclaw.
Multi: Dromoka, the Eternal, Kolaghan, the Storm's Fury, Silumgar, the Drifting Death.
2nd pick:
White: Sandblast, Elite Scaleguard, Lightform, Valorous Stance, Dragonscale Dragon.
Blue: Cloudform, Mistfire Adept, Reality Shift, Sage-Eye Avengers, Supplant Form.
Black: Reach of Shadows, Noxious Dragon, Crux of Fate, Brutal Hordechief.
Red: Bathe in Dragonfire, Pyrotechnics, Wild Slash, Flamewake Phoenix, Mob Rule.
Green: Destructor Dragon, Temur Sabertooth, Temur War Shaman.
Multi: Cunning Strike.
Artifact: Ugin, the Spirit Dragon.
3rd pick:
White: Pressure Point, Sandsteppe Outcast, Soul Summons, Abzan Skycaptain, Arashin Cleric, Dragon Bell Monk, Channel Harm, Honor's Reward, Jeskai Barricade, Lotus-Eye Mystics, Mardu Woe-Reaper, Sage's Reverie, Wandering Champion, Wardscale Dragon,
Mastery of the Unseen, Soulfire Grand Master.
Blue: Aven Surveyor, Jeskai Runemark, Jeskai Sage, Lotus Path Djinn, Refocus, Sultai Skullkeeper, Whisk Away, Write into Being, Marang River Prowler, Mindscour Dragon, Shifting Loyalties, Jeskai Infiltrator, Monastery Siege.
Black: Douse in Gloom, Hooded Assasin, Battle Brawler, Merciless Executioner, Orc Sureshot, Qarsi High Priest, Grave Strength, Mardu Shadowspear, Sultai Emissary, Alesha's Vanguard, Ancestral Vengeance, Gurmag Angler, Typhoid Rats, Palace Siege, Soulflayer, Ghastly Concription.
Red: Goblin Heelcutter, Humble Defector, Hungering Yeti, Rageform, Shockmaw Dragon, Vaultbreaker, Collateral Damage, Fierce Invocation, Mardu Runemark, Bloodfire Enforces, Mardu Scout, Flamerush Rider, Outpost Siege.
Green: Whisperer of the Wilds, Abzan Beastmaster, Abzan-Kin Guard, Battlefront Krushok, Cached Defenses, Formless Nurturing, Ruthless Instintcs, Sudden Reclamation, Frontier Mastodon, Hunt the Weak, Sandsteppe Mastodon, Wildcall.
Multi: Ehereal Ambush, Grim Contest, Harsh Sustenance, War Flare, Atarka, Wold Render, Ojutai, Soul of Winter.
Artifact: Hero's Blade, Ugin's Construct.