Voltron can really be done in any colors, but I do agree with you that WRU provide the best support for the archetype
It works well with token making strategies that make small dorks like the 1/1s you see with Soldiers, Squirrels, Goblins or Saprolings
The same goes for selling at a convention, though there can be wait times depending on when you go and how much you have for someone to look through
Aatchik, Emerald Radian is a good Aristocrats Commander or card for the 99 of another Golgari Aristocrats build
Arna is a very flexible commander, providing an incredible payoff to any type of "modified" strategy -- +1/+1 counter, auras, and equipment
Dual Ink types could bring variety to the game In the early days of Lorcana it seemed we were getting new decks and meta-relevant cards almost every set