Actually, Judo would be the TKD of the grappling world. Bjj isn't heavily influenced by its sport side, or a large governing body. A lot of Judo has been removed in order to facilitate its competitive side. There was actually a video showing all the techniques no longer taught in Judo because they were banned by the IJF. For example, you would rarely if ever go into a Bjj school and not be allowed to do a double leg takedown while rolling. However, that's the case in quite a few Judo dojos.
Also Judo and TKD are both Olympic sports.
Well i was going for the "very distinct but wasily traceable" aspect. Although, ITF would probably be the better examply than Kukki TKD.