Sonic's Universe:

The End(sonic Frontiers)

Dark Gaia

The Time Eater

Deadly Six

Mephiles the Dark

Infinite

Sage

Seelkadoom

Scourge

Nazo

Helluva/Hazbin's Universe:

Adam

Lute

Valentino

Velvette

Vox

Stella

Paimon

Striker

Crimson

Andrealphus

Exorcists

Mammon

more villains in the future