According to the official ATP ranking, there are 11 of those.
1) Murray
2) Vilas
3) Ashe
4) Orantes
5) Chang
6) Ivanisevic
7) Stich
8) Corretja
9) Haas
10) Korda
11) Norman
What do you think? We don't discuss these players much.
Vilas was an excellent player but he didn't have that awesome weapon that could put away shots like a del Potro forehand for example. Excellent passing shots, super stamina and a terrific backhand. His volley was not penetrating. Great backhand overhead.
Ashe, when he was in the zone was unbelievable on a court that he had good footing and he wasn't too bad on clay. Of these guys I believe outside of Goran he had the best serve easily. His backhand imo was also a great weapon along the lines of Murray in this group. I believe he also had the best volley in the group.
Bottom line is that I think Ashe was an immensely gifted player who never reached the heights that his talent suggested. He is one of the few in history that could hurt opponents with serve, volley, backhand and forehand. Unfortunately he often beat himself and didn't play enough percentage tennis. How many players can play at the power level he played against Laver in the first set at the 1969 Wimbledon and how many could turn it around and play the junk ball game that he played against Connors at the 1975 WImbledon final?
I think Murray may be very well the most talented of this whole bunch although all of them are talented. He is along with Chang imo the fastest of all these players with probably the best overall backhand and groundstrokes. He has a very good volley with excellent touch. His first serve is one of the best in this group.
I would rank Murray number one in this bunch. Number two is tough. I would think it's between Ashe and Vilas. According to Vainquers Ashe won at least 71 tournaments in his career while Vilas won 64. Ashe won the Australian, US Open and Wimbledon plus the WCT Championship. Vilas won two weak Australians, the French and the US Open.
It's close but I would go with Ashe as number two with Vilas number three. Basically I would agree with the rest of your list.
Wasn't Borg or Connors number two at one point on the ATP computer?