Aristocrats as it's known by for most, however I believe is shouldn't be restricted by the past and simply be called "Best deck in Standard."
Most people are aware of the 4-colour version however as I believe this version has a more direct game plan.
Most the choices for the deck are key pieces which can be catagorised easily:
Creatures:
Win con: Zulaport Cutthroat and Nantuko Husk, these cards are the core of the deck, sacrifice and win off it.
Card advantage: Elvish Visionary and Grim Haruspex, these 2 keep my hand full as I play, without them the deck runs out of gas very quickly.
Fodder: Carrier Thrall and Catacomb Sifter, these both supply 2 creatures for one card but also help filter and improve certain matchups.
Utility: Fleshbag Marauder, Merciless Executioner, Liliana, Heretical Healer
and Ayli, Eternal Pilgrim, the Executioner and Maruderer are both helpful in certain matchups (anything from control to Abzan) and the generate value from having a sacrifice built into them. Liliana gains life discards cards and brings creatures back, everything you can ask for in a card. Ayli is a new adition (of course) and as a sac outlet and board control in 1 I hope she works out.
Non-creatures:
Get me back in the game: Rally the Ancestors and Collected Company and both supremely good cards, as I catagorised them they can get you back into a winning position or even win the game on the spot.
Utility: Evolutionary Leap, this card has always been a saving grace, whenever its drawn it will always show its strength, especially in grindy matches.
Suggestions are welcomed :)