The ability to sac sub-optimal hatebears that we draw by chance into relevant threats and pieces of disruption is great
You could get Chaos Orb or Lingering Souls, Tolarian Academy or Skullclamp
On top of that, commanders that give you some kind of consistent and tangible resource whenever you gain life are best, whether thats in the form of +1/+1 counters, card advantage in any way, or targeted removal
Snow White has the brilliant effect of being unable to be challenged, and The Troubadour has Resist one to reduce all damage he receives
Some locations even give you lore at the start of your turn
This isnt really what you want in a commander, and honestly, Im not sure Id put this Denethor in the 99 of many decks either