All good advice and you have added some great fabrics. I would see if you could fine one more dark fabric as you need that too. Either a dark brown or dark burgandy.
The rail fence is a nice pattern. I was thinking a maple leaf. Here are some blocks from quilters cache.
http://www.quilterscache.com/A/AutumnStarBlock.html
http://www.quilterscache.com/B/BearPawBlock.html
http://www.quilterscache.com/M/MapleLeafBlock.html