This was discussed before, apparently with the consensus that it might be a good idea to extend the scope. There was a trial, but the results were never analyzed. There seems to be a consensus that 'identify-this-dancer' questions are off-topic.
So what do we do with questions like this one: What stock character/stereotype/thing does Cab Calloway imitate near the beginning of this 1950s "music video"?
This seems to be a question purely about dance moves that are totally unrelated to the music, and I consider it off-topic.
Dance and Music have a very close relationship and questions that specifically relate to this relationship should be considered on-topic.