I quit reading when I saw Budge in tier 1 A yet somehow you got Borg, Nadal, Sampras in Tier 1B :shock::shock:
Of course, you could make a more productive contribution to the thread and post
why you think I have over-rated Budge (as BobbyOne does below).
Logic, Budge was lucky during his amateur career to not having to deal with Vines, Perry (after 1936), Nüsslein (on clay!) and Tilden. In 1938 also von Cramm was absent. I doubt that he had won the Grand Slam in an open field.
I disagree with this - in his first year on the Pro Tour, Budge beat both Vines and Perry (the latter convincingly) head-to-head, so I think he would have a good shot against them the year before, when he won the Grand Slam.
Now, I'm not saying he would have won the Grand Slam in an open field, I'm just pointing out that he proved himself straight away to be better than the best Pros, and so he still would have done well in an open field.
In 1939 he lost the Southport tournament, also called "British Pro" to 46 years old Tilden who in final lost to Nüsslein. Tilden beat Budge at least 3 times in 1939. Nüsslein (not a typical indoor player) almost beat Budge at Wembley.
One bad loss doesn't invalidate Budge's whole career. I mean, Laver lost to an over-40 Gonzales, but that doesn't mean he's not Tier 1a.
Moreover that came in a smaller tournament; Budge still won the two Pro Slams he played that year (and "almost losing" at Wembley is irrelevant - he won and that is all that matters).
Vines in his pro tour with Budge in 1939 was handicapped in a certain period by injuries.
In 1941 Don was clearly outplayed by Perry.
You can't use injuries as an excuse, they are part of the game, and even if Vines was injured, that's not Budge's fault.
I don't have much info on 1941 - could you provide some details please?
This is a brief version of my overview on Budge before the War cut his prime short:
1937: 2 Amateur Majors
1938: Grand Slam (taking him to 6 consecutive Amateur Majors)
1939: Wins the Pro Tour over Vines and Perry and both Pro Majors he contests
1940: Wins 4/7 of the principal tournaments that year (as there is no Pro Tour), including the only Pro Major he contests
1941: Wins the Pro Tour over Tilden*, but loses the only Pro Major he contests
1942: Wins the Pro Tour over Bobby Riggs, Frank Kovacs, Perry and Les Stoefen and wins the only Pro Major he contests.
*(Yes, Tilden is old, but Budge demolishes him, and moreover, it's not Budge's fault that Tilden was his opponent for that year).
So, overall, it seems like Budge does very well - the only real negative being his loss in the Pro Major in 1941.
Moreover, Kramer himself rated Budge as the GOAT in 1979 (even after the feats of Gonzales, Rosewall and Laver). Now, I don't necessarily agree that Budge is the GOAT, but I think he must be a contender.
All of this leads me to rank in Budge in Tier 1a.