I think Liston beats Ingo in 1961. Without knowing about or seeing Floyd getting knocked out by Sonny any fight between Ingo and Liston before 1960 a is a genuine 50-50 matchup. Sonny looked an absolute monster beating up Harris and Williams. But they are just Harris and Williams. Not world champions. Ingo was very sharp in 1959. He knocked out the worlds best two fighters back to back.
Who had done more prior to that match? Jackson who had been boxing since 1882. Goddard lost the match before Jackson to a no name.