Hair goes either way. Usually for maximum power you either need baldness(full or a severe case of MPB) or a mullet. Stache also helps, beards mainly increase deadlift.
with the exception of serge reding
pretty much every olympic weightlifting champion in past and present has exceptional hair
powerlifters and bbers have a lot of baldness
i wonder why
seems to be on the uprise, back in the arnold day only some had balding and progeria