I think the most similar West African country to Brazil would be Cape Verde, speaking Portuguese, a large Mulatto/Mixed population (phenotypes overlap with Brazilians), Carnaval , in the Atlantic ocean etc. read more
Angola South- West africa, shares Capoeira with Brazil - an African martial art/dance. Also some say Angolan Semba music may have influenced Brazilian Samba. Also many slaves were taken from NIGERIA to Brazil, the Yoruba culture is prevailent in Afro-Brazilian cultures such as in the religion of Candomblé - is African mixed with Catholicism. read more