Hi guys, I was away for a while, you probably don't remember me
I wanted to say that I definitely agree with Prisoner of Birth.
Laver was obviously a giant, a tennis monument, and amazing player. He has won two times 4 majors out of 4 (1967, 1969), while Rosewall was able to achieve a similar feat only in 1963, but as you said, Rosewall emerge on his rival if we consider any other statistic.
I don't know if there's a GOAT, but if Kenny wasn't, he was surely not so far
Laver is probably in my top-5 too, but below Muscles.