Funny I just saw Raising Arizona again very recently - in the last week or so. I also never thought it was all that funny either. And agreed, Cohen brothers are phenomenal. I have no idea how they can be so prolific either. They just keep churning them out, several films every year it seems.
The Hudsucker Proxy was a lesser known Cohen Brothers film that deserved better. Paul Newman (his last film?), Tim Robbins, Bruce “the chin” Campbell and lots of snappy patter!