Umaro, Raging Yeti* Straight to you from the World of Ruin in the Revival Trance Commander Deck, Umaro is a beast of a design as a 6/6 for 6 with trample who will either pump your board, shoot something, or wheel you each turn at random
They do usually include a ramp package though and cards that can boost Progenitus despite its protection ability
You also get access to Tamiyo, Inquisitive Student, which you can flip relatively easily thanks to a playset of Thoughcast and Mishra's Baubles which you can recyle turn after turn with Emry, Lurker of the Loch
General's Enforcer also has slightly more toughness, allowing you a little extra protection for the guy protecting your board and with 2 power he still triggers cards like Mentor of the Meek
And with Ravnica Allegiance hitting the shelves, Skewer the Critics and Light Up the Stage want to join the party
Clown Car enables you to go wide or tall with your creatures and vehicle, or maybe even both but unfortunately, its luck that decides