After a little thought Lei may be very impressive too because his martial arts is basically 5 styles + drunken fist even though he is most likely weaker than Hwoarang and Law i think his fighting style is the most impressive.
I say Lei, since he’s trained in multiple animal-styled Kung Fu moves, he managed to take down a crook with a sitting bench, and more. Lei has incredible training to me.
But hey, if Jamie from Street Fighter can still be a fantastic fighter despite having a drunken style, so can Lei. Lei’s fun to play as, he’s very fast and agile, and he’s pretty skilled when it comes to busting crooks.