Sauron Zero, now with Nebula!
Forget about the Galactus matchup unless you can Polaris something into the Gal lane, but does stompingly well vs nearly everything else. Running at over 70% winrate and over 1 cube per game average after 42 games and seems to be my Infinite deck this season.
Update: Infinite and holding up at about 68% win rate, 0.83 cube rate to Infinite over 177 games. Great deck.