As Control decks come in a wide variety of forms within a wide range of color identities, we're going to examine the strongest Control options available in the Commander format
Repartee Whenever you cast an instant or sorcery spell that targets a creature, exile up to one target creature
Log In I'm not sure if the first non-keyword ability is actually template in a way that works, and it's certainly confusing by MTG's anti-ambiguity standards (someone's going to argue that the non-white creature has to be a target of the same black source that's damaging Cecil, and that's surely not intended but MTG goes out of its way to avoid the need for interpretation) Award a badge
You can even choose characters who don't have official names, as long as they're clearly defined characters, like the Wanderer
We did it, we names some non-white things it might help against
Your own pod counts too: games you track at the table or log after playing feed the same rankings