For some, Black Lotus is an investment, understanding the value of an item goes well beyond what an item is made of
Midnight Clock can be extremely powerful with additional support such as proliferate
Your creatures can also help produce mana , either by making things cost less (like Goblin Anarchomancer and Drumhunter) or by letting you play more lands every turn (like Loot, Exuberant Explorer or Silverback Elder Elder)
Im also a fan of flicker-based control commanders like Wan Shi Tong, Librarian and Ketramose, the First Dawn
I'll often cast her, immediately drop her loyalty to 2 and kill the biggest threat at the table, and then call it as someone swings into her and kills her
Oppressive enough to get banned while it was in Standard, Invoke Despair isnt all that impressive in Commander