If you want this deck to be playable, Giada, Font of Hope is probably your best bet for the commander
If you run one of these commanders, you may need to have a Rule 0 discussion with your pod before you play your deck: Generally, these are commanders that most players don't want to play against at, say, Bracket 2, as Commander Format Panel member, Gavin Verhey puts it
There are also a lot of excellent zombies that you'ld want to run anyway, like Gravecrawler or Sidisi, Undead Vizier, making this tribe much better than any other
With their expert diplomacy and ability to see far into the uncertain future, the Elven Council deck brings together even your opponents to sway the enemy forces in your favor
Welcome to an epic trading card game 65 million years in the making
Six mana for a 6/6 with flying and trample sounds like a great deal in Standard or Limited, where itd also be a scary threat, capable of grinding for value by bringing itself back after being landcycled