Have you tried the Camera Natural/Portrait/Landscape/Muted profiles, down in Camera Calibration, to see if any of them look more like you want?
My experience with the raw files from my OMD -EM1 is exactly the opposite. Do you have your computer monitor profiled and calibrated using a hardware device if not then you are viewing in the dark. Also make sure you are not applying any auto tone adjustments or presets on import.
SSprengel - thank-you for that advice. changing the profile to camera natural made a huge difference. The default was on Adobe Standard (which is terrible!)