Just to conform to the set criteria, here is my list
Witty
Konfab...tshwara ose ke walebala skaftini and all that ish he says in the background, probably the most well rounded MC in SA, fits all categories
Street
Don't know how to answer this one
But I'll go For Kaptain, Hegemony is a street track, Cops hara**ing, rhymes about everything from politics and social ish, that is what the streets need to here,at least that's what i think
Most slwpt on MC has to be Vernon Viscus Though, Cat IS MADD Sick, "reverse time, i done that in slow mo digital with audi visuall, remote school of thought, where crews are bought over bars like quarts on the house. Total Sickness