R&B Number-One Song of the Year Quiz

Every song to finish a year at number one on Billboard's R&B, soul and hip-hop year-end chart, from 1946 to the present — the complete published run. Name each from its year (the artist is your clue on the easier tiers), pick the year's real number one from a group of genuine chart-toppers, match each song to the artist credited with it, sort a selection into the order they led, or tap the R&B number ones out of a grid seeded with real pop and country chart-toppers. One year is missing and should be: Billboard suspended this chart for most of 1964. Parsed verbatim from the published year-end table; no answer is named here.