Making my dream bike come true
Honestly i have 2 of what you describe with a few variations - for gearing you don't need more than 2X11.  Light i would consider looking at a dynamo hub like SON 28.  Rear rack look at Thule, bike pannier rack (use to be called Freeload).

Suspension and dropper post these days come almost standard on most bikes and you don't need to go spend $7k plus to get one either. 

I would buy an out of the box bike and change that you want to change by sourcing parts from Chain Reaction Cycle or get your local bike shop to custom build you one.