The gold standard for these is Austere Command
At the beginning of your upkeep, if you control at least five Spirit creatures and Obzedat, Church Boss is in exile, return it to the battlefield transformed under your control
We also have a combo kill if combat isn't working: any creature that taps to put a land on to the battlefiled like Scaled Herbalist + Retreat to Coralhelm + any bounceland like Azorius Chancery = infinite landfall triggers
Other Fighters show a studied mastery of combat tactics, like Mirri, Weatherlight Duelist
Otherwise, you can check out the review we did on the Mystopia demo that recently came out.
(6/10/2022) If you control a Background that grants an ability to commander creatures you own, and you own more than one commander creature, each of them will have that ability.