Gonna post several random maps of Angola, Pre colonial or early colonial, these are only a small part of what I have but it's what I can access rn
Collage of a few maps of 19th century Portuguese occupation of Angola, top maps is more on the optimistic side, with much of the territory between Luanda Ambaca and Encoje being uncontrolled, the 1861 map seems clsoer to the reality tho Portugal would lose much of the area north of Luanda soon after the map, the 1878 map also should show more inland penetration in the south west probably.
19th century and pre-colonial war century livehood and ethnography of Southern angolan peoples
The Ndongo kingdom and its peoples and its "provinces" in the 16th century, the kingdom would slowly fall to the portuguese in the 17th century, but actual occupation of all of it wouldn't happen until the 19th century.
Kingdoms and people of Central-western Angola, 19th century, most of the central ones are ovimbundu kingdoms, of whom Bailundo is the largest (and they famously revolted in 1902)
Map of the Kongo Kingdom in the 19th century, note that it has then severly declined, Dark is maximum extent, grey is the claimed borders, nevertheless its capital são salvador remained the most populous city of modern Angola until the late 19th century with nearly 20,000 people
two maps of the Kongo kingdom and its many vassals at its apex in the 16th and early 17th century
Main population movement in Angola over the past millenium, the Jagas were by far the most impactful
EDIT: Just a higher res version of one fo the map above, Angola in 16th-early 17th century