The person with the most nominations across various categories is Quincy Jones, who has been nominated 80 times across 15 categories.
Jones is one of the most prolific producers, songwriters, composers, and musicians of all time, with a career that began over seven decades ago
According to the Grammys website, here are the 15 categories he's nominated in, with 28 wins from 80 nominations: the general category (like album of the year), spoken word, arranging, music video/film, jazz, pop, rap, R&B, children's, musical theater, disco, composition, gospel/contemporary Christian music, music for visual media, and production, non-classical.
He also holds the record for most-awarded producer (28 wins), and is tied for fourth for most wins in a single night, winning six Grammys in 1991.