I respect that this is a thread involving Nadal but if there’s any reference to dethroning the ‘Grass King’, that belongs to Novak.
Wow, you are something, aren't you? These are the actual facts, irrespective of whether you believe them or not.
1) Rafa dethroned the grass king: Rogie was the five time defending champion and rightly the king of grass. Nadal dethroned him in '08. On the contrary, Novak has never defeated Roger when the latter was a multiple time defending champion at Wimbledon.
2) Stan dethroned the Oz king: Novak was the three time defending champion in '14 and the overall 4 time winner. Stan took him out and went on to win that year.
3) Delpo dethroned the USO king: Roger was the five time defending champion in '09, and Delpo beat him in the finals.
4) Novak dethroned the "minor" Oz king: Roger was the two time defending champion and overall three time champion at the AO in '08. I say "minor king" because at that point, Roger wasn't the greatest at AO.
The closest Novak has ever come to dethroning (and subsequently getting crowned) a king has been at FO '15, but he didn't accomplish the latter.
To summarise, Novak has never dethroned the grass king. That honour rightly goes to Roger's true heir to GOATness, i.e., Rafael Nadal.