There are people who say that Sam Mangwana started Soukous in Abidjan when he created African All Stars. Making those short songs in French, since that they were a ban on Lingala-songs in French-West Africa (Mali, Togo, Ivory Coast, Senegal, etc.), just to fight Congolese music.
Then you have people saying that it was Bantous de la Capitale in Brazzaville (former OK-Jazz musicians who returned to Brazzaville in 1959) who created the term Soukous and also its genre.
I remember Tabu Ley claiming many times in interviews, when he used to live in exil in France (1990-1994), saying that he was the creator of Soukous. Saying that he created that fast tempo mixing Congolese music with Rock'n Roll with songs like Assambalela, when he was preparing his show at Olympia (1970). Also adding that he's in reality the father of the style the 3th generation plays (Zaiko, Thu Zahina, Isifi, Viva, Victoria, etc.), because he came with that swinging-style. Btw it was because of changing his music-style from slow-rumba to fast music, that he lost his nickname "Le Poete" to Simaro Lutumba Ndomanueno and Gina Efonge. Many people forgot that people used to name Tabu Ley in the 60's, "Le Poete" Rochereau.