I’m thinking Engels. Responsible, reliable, motivated, has money, knows how to manage it and is incredibly generous (he died with more than he gained from the factory sale despite supporting the whole German/communist underground in London).
Also who’d be worst? Would Marx ever catch up with his chores? Would Che disappear suddenly for months at a time?
(Not a very serious question obviously)
Ho Chi Mihn talked about being so excited, upon discovering the works of Lenin, that he would stand on his bed and recite speeches out loud, to no one.
So Uncle Ho is my pick, just because that seems like fun