Its worth noting that, unlike most other card games, the deck building rules in Disney Lorcana actually prevent you from using more than two different coloured Inks in a deck, so theres no fancy six colour Ink decks possible using the current iteration of the rules
Zombies were already established in Dimir with Grimgrin, Corpse-Born and Sultai with Sidisi, Brood Tyrant
Thinking outside the box a little, Ghirapur Orrery is a shoe-in and Retraced Image is a blue ramp card that most people are still sleeping on
I know you liked Kargan Dragonlord a lot, but I never found him to be that great
Additionally, lands that enter the battlefield tapped can slow down your game plan the more you lean on them but will often be easier on your budget
Daniel Holt, senior game designer : In Commander, cards must fit into the color identity of the face commander card