Khrn the Betrayer Kharn the Betrayer is high on this list, not because I think it makes for a good commander, but because its an exceptional addition to other Commander decks that I like
Wowzer Bowzer
White can manipulate +1/+1 counters almost as well as black handles sacrifice synergies, so you can build a beast of a deck with this Orzhov commander, if a slow one
Mickey Mouse - Steamboat Pilot Card 231/204, Emerald Ink The original black-and-white mouse that started it all, "Mickey Mouse - Steamboat Pilot" shows off a whistling grayscale Mickey on a colorful boa t
On one hand, you can make an Orc army thats pretty massive, able to do your defensive bidding while you attack with just about anything else, but theres also a light reanimation theme since Sauron can bring creatures back
Sliver Queen was the first five-color card, and it made it count