Definitely Ferre is in there , Adjani also a interesting choice
What I like about Adjani is the fact that he has a very deep voice but can also go super high, like what is the name of that song were Adjani sang Lacoste's part that one who was like "Emani" or something? Oh yes Fair Play let me find the actual minute
At 2:34
Plus the minute where he goes high
at 2:50 until 3:00
52:14 The whole Adjani impro is great
Café Rhoum's best tune where in Nzambe Aza Malamu and in Sassou Nguesso's song
5:36
And I have to say honourable mentions to Miel De Son and especially Taddet who have improved in the vocal section
About Ferré I prefer him now than when he started with Wenge I like that he had developed his own style