There are some OK-ish charts floating around that will give you as good an idea as you're going to get. Check out Scott Burnstein's chart. It's not literal, IMO, i.e. characterzing all of those people as "soldiers" as if they're out there every day doing the Outfit's dirty work, IMO, is not accurate at all.

But if will give you a fair idea of who's involved... a lot of them are dead since that chart was put out though.