High top fade haircut was popular in the late 80s and early 90s where rappers and hip hop folks popularized it. There were quiet a few NBA players who had this hairstyle back in the 80s and 90s. In the recent past again this style has shown signs of coming back. Check out the NBA players who have popularized it in the past and present.
Imam Shumpert got the top fade in September 2012, earlier having a low buzz cut. He is supposed to have the highest top fade in the NBA.
He also has had Adidas 3 striped logo shaved in the back of his top fade haircut which he had to remove later.
Brandon Jennings had high top fade in the seasons 2009,2010 and 2011. He dumped it in 2012 but is said to have revived this harstyle for the NBA.
Some old folks who have had the flat top fade in the past are as below.
Kenny Walker in the late 80s
Scottie Pippen was Michael Jordan’s sidekick