Doglion is one of the great full-sized, classic Muppet characters from Jim Hensons, seen here in an amazing performance with Doug Henning. Personally, I think it would be great to see a Lao American Yuk or similar character design.
Here, we also see the classic character of Sweetums. I rather like the chair Sweetums is sitting on. I think there's some very interesting work that could be done, over time, if one were to actively pursue it.