Evil Old Folks

Simple "middle-aged" or simply grey/white-haired characters who aren't particularly aged don't count.
4 vs. Satan:
*NONE
Alex in Princess Quest:
*NONE
The Stone of Power:
*Artimus and Balthar are two Dukes willing to destroy a kingdom.
The Three Kingdoms
*Vlados Palerius is an old king, who aims to destroy town for his reign.
Dragondawn
*Dave, the first culprit.
Harter Knall
*King Greyland and Gergun.
Hero Story
*Gravon.
Kill the Demons
*NONE
Satan Saga
* Trianuk and Pope Bonmos.
Story of Hero:
*Saridan.
The Legend of Devils
*NONE
The Sidestory Duology:
*Rudolf Hitler.
The Time Of Bloody Fear:
*NONE