I feel he is knocking at the door of Bjorn Borg's spot, but I feel like he wont get there. Or maybe that is just wishful thinking.
Lendl and Nadal are very close ofcourse, it depends alot on what you personaly value. With Lendl you have longevity and consistensy wgile Nadal so far has more grand slams and the career slam.
You think Lendl wouldn't have 3 Wimbledons with the grass today and you think Nadal would win one on fast low bouncing grass? Can't compare when court conditions are the same.
He isn't close to Lendl or to Borg.