Operational examples are SST editorial frameworks, not value or earnings promises.
Dark Magician of Destruction From Yu-Gi-Oh
Decks like Dragapult ex, Ns Zoroark ex, Festival Lead, and Hide n Sneak are optimized to facilitate attacks that cost one or two Energy, so Ancient Bulwark could cause the opponent to miss a turn of attack or discourage them from spending their Energy attachment for the turn on a support Pokmon like Munkidori
Originally a high monster-count aggro Deck, the release of Storm of Ragnarok shifted it into a combo Deck, with "Legendary Six Samurai - Shi En" acting as a strong endboard piece (especially for the time), and various searchers ("Shien's Smoke Signal", "Reinforcement of the Army", and "Gateway of the Six") enabling higher consistency
Theres so much more to the graveyard than total dedication, and most decks can reap some benefit from including it in their plans