No, you can't bend aluminum bars to any extent with normal tools.Heat them and they bend, but they sorta cave in and lose their roundness.
I know what you mean about the neutral position of your wrists.I like a position like the position with my hands at my sides.The usual straight bars or just the tiny 5-8 degrees of back bend just isn't enough. Old style bars with a dramatic backwards bend had it right for comfort.
Luck,
Charlie