>>353939459
Your showcase would be more in how you present the judging area itself and there are a lot of ways you can make that engaging. I'm partial to the idea of making this thematic with the event itself. Since this is Halloween you could organize the contestants into different areas of a "spook house" for everyone else to go through and view. During the judging period the announcer could go around as well and highlight different anons individually on stream. 
At the end you get to specifically show off the winners or runner up for each category in more detail so I feel that covers giving everyone the opportunity for a bit if they have one.