I respect your opinion but wholly disagree with H5 having the best multiplayer. In my opinion, Reach had the best feel to its multiplayer, up until 343 got hold of it and introduced their Title Update patch. I also say H4 was better than 5 and Infinite is lacking something I cant grasp, something is missing or maybe theres too much?
The Jackbox Party Packs are good for groups up to 8. Sometimes 10, sometimes 6, its game to game dependant.
“Werewolf” type games can be expanded to larger groups, its a social deduction and bluffing game where players are slowly eliminated and in turn vote out other players they deem the hidden enemy