Not still alive, but the Kiffians of the Sahara dating back some 10,000 years ago were a very tall people with heights of 6' 8" common for both male
and female, they appear to have been a Caucasian people from North Africa, when conditions changed and the region became arid they appear to have
"Approximately two hundred human burials were discovered on the edge of a
paleolake in Niger that provide a uniquely preserved record of human occupation in the Sahara during the Holocene (~8000 B.C.E. to the present).
...tall in stature, approaching two meters for both males and females. Hyperflexed, supine burial postures predominate, their compact configuration
and anatomical articulation suggesting that their...