'It depends on when you're talking about' Fadda's school won a contest against Gracie's school in the 1950s and the wins are attributed to Fadda's students use of leg locks. This is typically one of the first stories told when someone brings up the history of leg locks being viewed negatively in BJJ. I can't think of anyone modern who's well known as leg locker, but I'm sure GFTeam or Nova União have some that I just can't think of. This gets back to the point that lineage matters way less than who they train with and what rule sets they're training for.