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While most creatures with afterlife are technically better than the token they create when they die (like Seraph of the Scales), its still always good when the cards you sacrifice give you some extra benefits

You can only use each effect of "Sylvan Dancepione" once per turn

Secure the Wastes shows Bashenga, the very first Black Panther back in the Bronze Age, while Karns Skyscraper takes us all the way to the modernity of Wakanda

The remaining few require some form of hoop jumping like with Oblation (shuffling a permanent into your library), Bennie Bracks (making tokens), and Halo Fountain (paying mana and untapping two untapped creatures)