So, well go through them all and rank them from best to worst
My theory on Sol Ring (and ramp in general, for that matter) is either we want it all the time or we should work around it, because if it means 10% of our deck is dead after our opening hand, it's probably not worth it
Legendary Creature - Wizard Rat Ninja Satsuki, the Living Lore : Put a lore counter on each Saga you control
That means you will almost always draw a card off [casthaven]Nessian Game Warden[/casthaven], and you even get the choice of the best one if you hit multiples
As I started going through more options, though, I realized that "essentials" here could mean things like Dockside Extortionist, Purphoros, God of Forge
Together with Ajani, Nacatl Pariah, these form the trifecta of absolutely unfair cheap white creatures from Modern Horizons 3 (honorable shoutout to Phelia, Exuberant Shepherd)