I always thought Piangi was a very dull character in POTO until I saw the most recent tour. He was funnier than Carlotta. I also second (or third) Meg, and add Mdm. Giry to the list.
Also Ambrose in "Hello, Dolly", Lt. Cable and Liat in "South Pacific". There are more, I just have to think.
"If this is going to be a Christian nation that doesn't help the poor, either we have to pretend that Jesus was just as selfish as we are, or we've got to acknowledge that He commanded us to love the poor and serve the needy without condition and then admit that we just don't want to do it." -Stephen Colbert