Derevi, Empyrial Tactician While Derevi, Empyrial Tactician is best known in cEDH circles for its Stax builds (and as someone who has had their resources completely choked out multiple times this way, its reputation is well deserved ), the ability to tap or untap a permanent when it enters the battlefield also offers a lot of opportunities for abuse
Byrke, Long Ear of the Law Byrke, Long Ear of the Law works well as a commander for a deck focused on +1/+1 counters
Olivia, Crimson Bride Olivia, Crimson Brides reanimate ability is high risk high reward since both Olivia and the reanimated creatures have to attack
Tifa Lockheart even has the potential to see competitive play in some hyper-aggro strategies, which could make her even more desirable
The "Blizzara" mode is a good removal spell we see in every set, and this has the upside of being a solid bounce spell early and a more powerful removal spell late