Where's the African artifacts ?
Where's the Aftican skulls?
Where's the African DNA in natives?
In addiction to the first hand accounts i listed by people who actually seen the early American inhabitants that you disregarded...
Genetic studies indicate the Lacandon Indians, the most secluded of Mayan tribes, had extensive contact with Africans. The report conducted by Dr. Alphonso de Garay, director of the Genetic Program of the National Commission for Nuclear Energy in Mexico, included among other things, a reference to the Indians carrying the sickle cell trait.
Leo Weiner, a Harvard linguist, who was mentioned in here earlier sited linguistic evidence of an African presence in America. For example the, gold spears the africans carried and witnessed by indians in the Carribeans were called guanin. The etymology of it has been traced to the mande languages of w africa.
The hall bay archeological find, found negroid skeletons dated 1250 ce.
As far as artifacts/anthropology , how is it there was no tin found in pre Columbian America but there is bronze. Metallurgy is a long process so how did they skip straight to bronze with no outside influence? Same thing with pyramid building, africans prefected the craft over millennias but the oldest one in La Venta suggest outside influnce. Or what about yams and bannnanas being found in tombs in peru while neither are indigenous to America but are in Africa.