Why Mordekaiser doesn't have any Allied Champs?

So this is a rant regarding how many champs are actually allied to Mordekaiser, it feels lonely playing league knowing that Most champs lore wise are hostile to Mordekaiser, i know karthus dialogues towards him suggest they are somewhat allies, but the lore doesn't reflect that.

Any lore expert here, What are some of Mordekaiser Allies/servants?