Between this and the fact that blacks best mana ramp spells only tend to thrive in specific niches of the Commander format, such as cEDH, mono and two color black decks, combo decks, and/or builds with reliable access to Urborg, Tomb of Yawgmoth, theres really no way to rank these cards
Take Sedris, the Traitor King for example
And we couldn't just have one of them as a legendary character, so we get another legendary pair
Exiling artifacts and enchantments is an example of something that can be absolutely critical in some games and completely worthless in others, so it made a perfect candidate for a basic landcycling card
Sorin, Grim Nemesis Sorin, Grim Nemesis is my 2nd favorite Sorin, with Sorin Markov barely hitting at #1.The Nemesis of the Grim is pretty dire for your foes, as well
They have fed each other symbiotically in virtually every format, and therefore are together here as well