He is 8' 8". Rogan was son to a slave and second tallest in the world. He started to get really tall at the age of 13. He also had a disease but this one was called ankylosis. https://en.wikipedia.org/wiki/John_Rogan
He is 8' 5". He was the tallest man in Ukrainian. He started getting really tall at 14 after brain surgery. He had a tumor. Pituitary Gland tumor is when you get really tall.
5
Vaino Myllyrinne
He is 8' 3". Although he was super tall he was a wrestler. He was originally 7' 4" but got a second growth spurt in his thirties.
6
Edouard Beaupre
He is 8' 3". He was in the circus because of his height. He had a large family and he was one of twenty kids. He didn't have a disease.
7
Sultan Kosen
He is 8' 3". Right now he is the tallest living man. He got so tall by a tumor that affected his pituitary gland.
8
Bernard Coyne
He is 8' 2". He got drafted in World War and died young at the age of 24.
9
Don Koehler
He is 8' 2". He died at the age of 56 because of a growth disease called acromegalic gigantism.
10
Vikas Uppal
He is 8' 2". He was the tallest man in India until he died because of a tumor operation that failed.