Vincente Guerrero was the 2nd president of Mexico. He was of African and Native descent.
He also actually ended slavery in Mexico. In 1829. Almost 40 years before it ended in the USA.
He is one of my favorite historical figures, though he met a sorry end.
Here is Clause 12 of El plan de Iguala:
All inhabitants . . . without distinction of their European, African or Indian origins are citizens . . . with full freedom to pursue their livelihoods according to their merits and virtues.”
Note: The first Black heads of state were in Haiti, of course.