Released in November of 1982, I would have to go with "Thriller", because it was the zenith of his illustrious संगीत career and having sold over 47,000,000 copies worldwide, it's still the biggest-selling album of all time
I प्यार all his albums, each one is special.. but I would go with Thriller too. It's a masterpiece and it's still the best selling album of all time! Thriller was a revolutionary album...it all began from there.