Having fans off at low loads is referred to as "semipassive" cooling. With the right components you can build a system like that fairly easily.
Yours however seems overly complicated and unnecessarily risky in the first place. I don't think panel-moving's a viable solution in the long term, as you'll just get frustrated with it, especially when you find out how many easier options there are. Also, an excessive number of fans - especially when it means opening up big holes in the case - will increase noise noticeably with little benefit for cooling compared to a well-designed and power efficient setup.
Speaking of, what sort of setup will you be doing in the case? I can't see anything outlined in your signature or in the post. This is the principal question, as that determines what sort of cooling you will even need.
The drafts are missing GPU cooler flow, which would most likely be either out the back or out the back and
into the case's bottom section. They all look like workable solutions on the surface, but experience says #1 is the most likely to work. I've tried all sorts of silly setups along the years, but the engineers who designed the classic ATX layout had a pretty good idea about what they were doing.