Use Adobe Lightroom's selective adjustments for tonal control
Before you go local with your adjustments, start global and do a basic conversion. Adjust white balance and exposure, and decide whether or not to use a built-in lens profile. This exposure is very dark, but it has the best highlight detail of the three the photographer shot for the original HDR image. Bring back as much shadow detail as possible, then use the color and luminance noise reduction tools to make the image usable.