When I first became interested in Human Origins, back in the 1960s, the only known ancestors were: the Neanderthals, Homo Erectus, Homo Habilis and Australopithecus Africanus. Over the last 50 years an enormous amount if information has been found by scientific researchers. The story of human origins has become more complex and much more interesting.
The series of videos in this post give an excellent summary of the of the current understanding of the field.
The only issues left out are the Denisovans , Homo floresiensis and the Red Dear Cave People These are fairly recent findings and are still enigmatic so it is not surprising that they have been left out. These three groups, though, support the possibility that non-modern humans persisted until relatively recent times.
Thank you to Black Ryder Films for producing this great series.
Here is a link to a documentary series on Darwin.