Who is the best taekwondo player of all times?

Answer 1

The guy above gave the "screen name" in the movie.

Phillp Rhee played the part.His father is Simon Rhee,one of
history's best in the style.

The point can be argued of course,but one of the very best
in Tae Kwon Do would be "Byong Yu"

http://www.byongyu.com/main_menu.htm

Answer 2

Watch the movie Best Of The Best
Tommy Lee is I think his name
First I seen of Tae Kwon Do using Leverages and Joint Locks
Cool Stuff