This is a brand new mod that adds a bunch of powerful companions to the game - it's meant for late-games when you need lords and such to recruit as vassals. The author made it compatible with Diplomacy 2.8, anyway check it out:
http://forums.taleworlds.com/index.php/topic,129012.0.html
http://forums.taleworlds.com/index.php/topic,129012.0.html