All true. But the two guys who win the most outright winners with their backhand are Wang Hao and Dimitri Ovtcharov. Dima's backhand third ball attack is one of the most impressive shots in table tennis today, IMHO. Even the top Chinese simply can't handle it when he unleashes it, it's probably the main reason he has reached the level that he is at now. The liabilities that keep him from beating the top Chinese more regularly are in mobility and the fact that his forehand is weak for his standard of play. But his backhand is simply unreal. Perhaps not the spectacular visual display of Kreanga. But more effective at actually beating people, or at least stringing together several good matches in a row.
Wang Hao backhand speaks for itself.
I think Jorgen Persson should be on the list, even if he is older than dirt. In the 90s, without question, he had the most versatile backhand on the planet.