The Marx Brothers were awesome! A couple of trivia items; Harpo's real name was "Adolf" so it's easy to see why they didn't use that name. Chico had a *MAJOR* gambling problem. I've read that they only did their last movie to pay off Chico's gambling debts and get him some sort of retirement funds.
I may have missed it, but did no one mention the three stooges?
I guess you could say they were in a category all their own. A classic case where you might be thinking how stupid the whole thing is, and suddenly there you are laughing.