According to Osho, no one and nothing is complementary to a Buddha; Buddhahood stands beyond all dualities and has no opposite. A Buddha is 'neither this nor that'—beyond life/death, happiness/unhappiness, agony/ecstasy, body/soul. Realization arises through choiceless awareness, dropping all preferences and even the idea of enlightenment, thereby transcending the polarity-mind altogether.
A Buddha has no matching opposite because being a Buddha means going beyond all either-or choices.