Heihachi, the central character of the Tekken series, had to be listed here. After so many iterations in the series, Bandai Namco does a great job of pushing Heihachi to the limit by introducing new, amazing moves. One of them is the infamous d+2+3 (down + right punch + left kick) that can insta-kill an opponent from a distance -- if their life total is low enough.
It is incredible how Heihachi can still be relevant and so well-balanced even after so many years. If you enjoy the classic Tekken fighting style, or you are generally a nostalgic player, then this would be your choice for the tourney.
His Rage Art (down + left punch + right punch) cannot be missed either: