Putting Nadal ahead of Court and Rosewall reflects the ignorance and lack of knowledge of this list.
The list is seriously biased against pre Open Era legends while unfairly favours players after the 2000's. That's why they put Venus and Henin over Connolly and Moody.
On men's side, I think Laver is the greatest, followed by Rosewall, Federer and Pancho, Sampras.
Federer is dominated by his major rival Nadal, while Laver is quite even against Rosewall.
Laver has the grand slam, Federer doesn't. Laver and Rosewall and Pancho were barred from attending majors in their prime, their achievements in pro should be treated seriously. If we treated their years in pro tennis seriously, it's easy to put Laver, Rosewall and Pancho into top 5 list.