Arrowverse Main Villains

Arrow

 * Season 1 - Malcolm Merlyn / The Dark Archer
 * Season 2 - Slade Wilson / Deathstroke
 * Season 3 - Ra's al Ghul
 * Season 4 - Damian Darhk
 * Season 5 - Adrian Chase / Prometheus
 * Season 6 - Cayden James and Ricardo Diaz / The Dragon
 * Season 7 - Ricardo Diaz / The Dragon and The Longbow Hunters

The Flash

 * Season 1 - Eobard Thawne / Reverse-Flash
 * Season 2 - Hunter Zolomon / Zoom
 * Season 3 - Barry Allen / Savitar
 * Season 4 - Clifford DeVoe / The Thinker
 * Season 5 - Orlin / Cicada

Legends of Tomorrow

 * Season 1 - Vandal Savage
 * Season 2 - Legion of Doom
 * Season 3 - Mallus
 * Season 4 - TBA

Supergirl

 * Season 1 - Non
 * Season 2 - Rhea
 * Season 3 - Samantha Arias / Reign
 * Season 4 - Ben Lockwood / Agent Liberty

Vixen

 * Season 1 - Kuasa
 * Season 2 - Benatu Eshu

Freedom Fighters: The Ray

 * Season 1 - New Reich
 * Season 2 - New Reich

Constantine

 * Season 1 - Manny

Black Lightning

 * Season 1 - Tobias Whale
 * Season 2 - Tobias Whale