I agree that he's above Wilander/Becker/Edberg now. But I disagree that he's only a little short of Agassi/Lendl/Connors/McEnroe. I like to look beyond the majors (although that is the weightiest factor).
If Nole wins two more majors this year, including the French Open for the career slam, then I'd place him still slightly behind those guys. Simply because he's still far short in total number of titles compared to all of them, and way wayyyy behind in # of weeks as #1 when compared to all of them except Agassi.
I'll place Novak on par with them if and when he wins his 9th slam, and when he ends this year as #1 (very likely).
The Fedality: 30 Slams, 8 YE #1, Olympic Gold in S&D, 6 YEC, 47 Masters, 140 Titles
RF: 17 (4-1-7-5). RN: 13 (1-8-2-2).