Both sides of Valki are excellent, with Valki being hand disruption useful in the early game to steal a powerful creature (with the potential to turn into it later), while Tibalt is a great end-game card, capable of removing multiple creatures and stealing cards from your opponents' libraries to cast yourself
Brenard is a spicy commander to brew around
Titans in particular could still be included, but youre just going to have to pray that Laughter hits the expensive Titans early on, and not after its exiled twenty other cards
Start with the people you know in person, and then move online
These commanders make for a great choice to lead your decks
So, even though it's not destroying anything, you can actually prevent not only the Ba Sing Se that is already on the battlefield from making any relentless 2/2 attackers, but all future copies of Ba Sing Se