thrust, Emerson
thrust, Emerson had good wins in 1968 but no great win in open era at all. His best performance was reaching the 1970 Wimbledon's QF losing to winner, Newcombe, in five sets.
He lost to 40 years old Gonzalez twice in 1968 on clay and beat Laver 5 times in smaller events. I rate Emerson the most overrated player in history.
You are totally right about Ken, Rod and Pancho winning many additional GS tournaments. You might not know that I once was treated as an idiot by a few fellow posters, among them Limpinhitter, when I claimed that Rosewall, if he had not turned pro and the other players had turned pro as they really did (Gonzalez, Hoad, Laver and so on), would probably had a resume of 40 GS titles or even more (1953 to 1972). Similar amount would be right for Pancho. Not for Rod because he did not have such an expended long career as a top player. Reason is that Rosewall would have been seeded No.1 and the strongest player at almost all GS tournaments (amateurs) from 1957 to 1968, exactly to the 1968 Australian Championships.
Limpinhitter and a certain other poster changed my claim to a totally different claim, i. e. that Rosewall would have won 40 or more "open" GS tournaments which is of course nonsense. But I believe that Tilden, Rosewall, Gonzalez and maybe Laver would have won more than 20 GS tournaments if open era would have come already in 1920.
I'm still waiting for Limpin's apology for his claim which he made in order to make me look an idiot...