Niacin might help but I wouldn't worry about it too much. As long as your diet is clean and you train hard enough to make your heart go over RHR, HDL is not that good an indicator of heart health. Even LDL is not that good a predictor as molecule size vary greatly between LDL particles. I read TONS of article on the subject as all of my family members have hypercholesterolemia, yet no one ever died of an heart attack...
Statins are poison, good decision on keeping away from them.