Archfiend

Here are the archfiend monsters and supporters:
 * Archfiend Soldier
 * Darkbishop Archfiend
 * Desrook Archfiend
 * Infernalqueen Archfiend
 * Shadowknight Archfiend
 * Skull Archfiend of Lightning
 * Terrorking Archfiend
 * Vilepawn Archfiend
 * Pandemonium Watchbear (This isn't an archfiend, but it's a support card)

There are also other "Archfiend" cards that don't have the classic text. They are:
 * Archfiend Marmot of Nefariousness
 * Cyber Archfiend
 * B. Skull Dragon
 * Beast of Talwar
 * Fiend Skull Dragon
 * Lesser Fiend
 * Shadow Tamer
 * Summoned Skull
 * Toon Summoned Skull

Non-Monster Support Cards:
 * Archfiend's Roar
 * Pandemonium
 * Battle-Scarred
 * Checkmate
 * Falling Down
 * Archfiend's Oath (This has archfiend in its name, but doesn't really help archfiends. This is similar to the Gravekeeper's Servant relationship with Gravekeeper's)

Other Non-Monster Archfiend Support Cards:
 * Axe of Despair