Looking for suggestions for a Cost reduction commander

I've never really played into cost reduction, apart from a Morophon and a Golbez deck, and I'd like to try it out in a new deck. For clarification, I don't care about colors, though I always love being able to play black (but if not, that's completely ok); I'd like some suggestions for overall cost reduction, rather than specific card type cost reduction: I'm fine with creature spells cost reduction or non-creature spells cost reduction but I'd rather avoid instants and sorceries because I'm not good at all with spellslinger decks, I can't manage to play properly with them.

I've already thought of [[Commander Liara Portyr]], which seems fun, but I don't have a lot of impulse draw cards and I fear it might end up being a bit weak for my LGS. Also thought of [[Samut, the driving force]], but I really dislike how the speed mechanic plays... [[Doc Aurlock, grizzled genius]] is out of the question, I don't have any plot cards. And [[Animar, soul of elements]] might be a bit too strong; also a friend of mine already has an Animar deck and I don't want to tread on his toes