Stevie Wonder, 1976. Double LP plus a 4-song EP. 21 tracks across 17 winning Grammy formats. Sir Duke, Isn't She Lovely.
From Wikipedia
Songs in the Key of Life is the eighteenth studio album by the American singer, songwriter and musician Stevie Wonder. A triple album, it was released on September 28, 1976, by Tamla Records, a division of Motown. The album is regarded as the culmination of Wonder's "classic period" of recording which began in 1972 with Music of My Mind.