If you want a good taste of true technical yoyoing, there is a variety of names that can be brought up and to watch their clip videos/freestyle back in 2004.
In my personal opinion, 2004 was the year of technical yoyoing.
Names like Yuuki Spencer, Jesse Garcia, Justin Weber, Johnnie Devalle and Jordan Cooper were pushing to the extremes on the possiblities of string origami or technical yoyoing.
Technical yoyoing is often refered to by complex string formations and technical knot work. The use of the wrist mount exploded technical yoyoing. Often times tech does not have many element uses compared to todays combos.
Over the course of years, yoyoers have included more flow, pacing and element use into their technical yoyoing to create something really beautiful. A good example of flow combined with tech is Zach Gormley’s style. Howevever this all really started due to Jensen Kimmit and Augie ( I am using the United States yoyo scene as an example). Both players really showed a flow like pattern to their yoyoing while also grasping technical yoyoing which allowed players like Gentry Stein, Harold Owens and many others to improve on it.