That GIF cuts it off by there are two liver shots in that sequence. One with the fist vertical and the next with the fist turned over to knife it in with one uppercut between them. Here's a good breakdown of the entire sequence to see all of what GGG is doing. Start at 0:40 in... http://youtu.be/JfsgMK0w9R8 Anyway, GGG does have one of the best liver shots.
Lomachenko, most just don't know it yet. Rigo has a nice one, as does GGG. I liked Canelo's against Anguo as well.