Krenko, Baron of Tin Street might not be the best, but it offers an interesting segue into artifact-matters themes that add dimension to the board-spam that goblin commanders like Krenko, Mob Boss and Muxus, Goblin Grandee are known for
Just don't be too greedy and keep in mind you can choose just one of the options every time
Sokka, Swordmaster Sokka, Swordmaster looks like a great new pickup for Equipment and Voltron decks in Commander
(R&D refers to these as "[autocard mvid="413601"]Man-o'-Wars," based on the first card that did it.) White can only bounce its own permanents to protect them (and often to do cool combo-ish things)
This ensures you can sleeve your collection efficiently without worrying about running out of protective gear, allowing you to focus more on strategizing your gameplay and less on managing your card accessories