Ma Lin's forehand counter loop and third balls were amazing a few years before. I'm missing he
Also about the forehand smash, Xu Xin can not come even come close to Ma Long, Zhang Jike and Fan Zhendong smashes. Because they twiddle for smash but he can't because he is a penholder. Fan Zhendong is not as tall as Ma Long and Zhang Jike so he some time can't reach the ball that are so high. Between Zhang Jike and Ma Long, it's really hard to chose the best. But Zhang Jike has slightly more power, probably because he has a bigger body. I remember in his match against Joo Sea Hyuk at 2012 Olympics, he smashed a ball straight out of the core! But still Zhang Jike and Ma Long are pretty close about the forehand smash.
In forehand block most of Chinese players are not as good as the other players because their forehand rubber is tacky and not good for blocking. And no player usually use forehand block in his game. So i have no idea how is the best at
this shot. Probably Timo Boll or some other European player.
In forehand lob Xu xin is so many steps ahead from the others.
No need to say Joo Sea Hyuk is the best at forehand chop and after he, Masato Shiono is the second.