While enchantments are nearly as likely to be put into the graveyard as creatures or artifacts, there are plenty of good enchantments that sacrifice for good effect Aura of Silence, Pursuit of Knowledge, Seal of Cleansing, Soul Snare and thats just in white
Im not sure this card beats out established commanders like Sram, Senior Edificer, but you can make a firm argument for it
For example, the Simba - Future King card is different from the Simba - Returned King card, so a player could have four of each card in their deck
Up till now, however, Bennie Brecks only saw one printing in a Streets of New Capenna Commander deck, making its scarcity become far outweighed by its demand
Otherwise, drop me a tweet at @bradleyrose
It practically gives you a level of deck control that feels like cheating when used correctly